# Rooftop Unit Repair Toronto | 24/7 RTU Repair | Toronto Heat Pump Pros

> Rooftop unit repair in Toronto. RTU troubleshooting, compressor and refrigerant work on commercial equipment, 24/7 emergency dispatch. Written repair or replace advice first. (647) 277-5401.

URL: https://torontoheatpumppros.ca/commercial-rooftop-unit-rtu-repair-toronto/

24/7 Emergency Dispatch

# Commercial Rooftop Unit RTU Repair Toronto: 24/7 Emergency Service for Landlords and Restaurants

Last updated: October 24, 2026

Rooftop unit repair in Toronto for commercial landlords and restaurant and retail owners. RTU troubleshooting, compressor and refrigerant work, 24/7 emergency dispatch.

-   24/7 phone answered and after-hours emergency dispatch for no-cool and no-heat calls
-   Full RTU diagnostic on every call-out, with written readings before any work
-   Compressor, condenser motor, refrigerant and control board work on commercial equipment
-   Written repair-versus-replace advice so you can make the call with numbers

Diagnostic first, written quote second From $275

Call 24/7: (647) 277-5401

[tel:+16472775401 →](tel:+16472775401)

 

Or request a callback

[/contact/ →](/contact/)

Paperwork submitted5-day turnaroundNo subcontractors

![Old top-discharge rooftop condenser crammed between parapets on a Toronto commercial roof](/images/misc/bulky-old-top-discharge-ac-condenser-crammed-again.webp)

**$1,840 repair, plus a written repair-versus-replace recommendation for the unit** Liberty Village, Toronto

\-30C Rated Cold Spec

-   17+ Years Combined
-   Red Seal + TSSA + ESA + HRAI
-   Rebates to $14,100
-   Mitsubishi + Daikin + Fujitsu Certified
-   24/7 Emergency Repair

A rooftop unit failure is different from a residential no-heat call in one specific way that matters commercially: there is usually a business attached to it. A restaurant with 180 covers booked, a retail floor with a stock count on Friday, an office landlord with a lease that says the space is conditioned. The cost of the repair is rarely the biggest number in the conversation, and treating it that way is how good contractors get replaced.

We repair packaged rooftop units and commercial heat pump rooftop units across Toronto and the GTA. Our phone is answered 24/7, after-hours dispatch is available, and every call-out produces a real diagnostic with written readings, followed by a written repair-versus-replace recommendation before any parts are ordered.

We hold Red Seal, TSSA, ESA and HRAI credentials, carry $5M liability and WSIB coverage, and stock the parts that fix commercial failures on the truck rather than on a back order.

## How we diagnose a rooftop unit

A commercial RTU has more failure modes than a residential system, and the symptoms overlap. A restaurant owner telling us “the air is warm” has narrowed it down very little. So the diagnostic is systematic rather than a guess based on the first symptom:

-   **Electrical.** Supply voltage, contactors, capacitors, overloads and safeties. We measure under load, not at rest. A capacitor that tests fine on a meter can still fail the moment it heats up.
-   **Refrigerant.** Superheat, subcooling, suction and discharge temperatures and pressures, and a leak search with an electronic detector. A correct charge on a leaking unit is not a repair, it is a delay.
-   **Airflow.** Static pressure across the coil and the supply, blower motor amps, filter and coil condition, and any collapsed or disconnected flex duct. Failed blower motors and blocked filters cause the same warm-air complaint.
-   **Controls.** Thermostat, defrost controls and sensors, reversing valve operation, low-limit and freeze protection, and the unit’s own control board fault codes.
-   **Economizer and outdoor air.** Economizer control and enthalpy control, damper motors, and mixed air sensors. A stuck economizer can pull a building down at 6am on a mild day.
-   **Fuel side**, on gas units: manifold pressure, ignition, flame sensors, the heat exchanger and combustion analysis.

Each of those produces a reading, and the readings go into the report. That is what separates a diagnosis from an opinion.

## Compressor and refrigerant work on commercial equipment

Compressor failure on a rooftop unit is the most expensive repair we do, and the most common one we get wrong by accident. Two things make commercial refrigerant work different from residential.

**Scale.** A 10-ton commercial unit holds roughly twice the charge of a large residential system, so a leak does more damage before it is found, and the recovery, handling and recharge is a longer, heavier job. Recovery is done properly, with cylinders, a scale and documented weights, because an undocumented charge on a rooftop unit is a liability if a leak is ever questioned.

**Refrigerant transition.** R-410A is still being serviced in equipment across Toronto, and we repair and recharge R-410A systems with R-410A. New equipment uses R-32 or R-454B under Ontario and federal rules, which is one of the strongest financial arguments for replacing rather than repairing a failed unit: the new machine moves you out of a refrigerant class with a scheduled phase-out.

On condensers and compressors themselves, we replace rather than rebuild where the economics support it. A failed compressor on a marginal old unit often means the condenser coils, the contactors and the safeties are all at the end of their lives too, and a compressor swap into a tired cabinet can leave you paying again in six months. We will show you that reasoning in writing.

## Emergency after-hours rooftop service

Commercial failures do not keep office hours. Our phone is answered 24/7 and after-hours dispatch is available for no-cool and no-heat calls.

When you call, the dispatch questions are short: make and tonnage of the unit, fuel type, refrigerant type, what the unit is doing, and whether there is any sign of a leak, frost or unusual noise. That information lets us send the right technician with the right parts, which is the difference between a same-visit repair and a second visit.

For restaurants and retail, we plan around the trading day. Where the unit can be diagnosed and repaired in one visit, that is the goal. Where it cannot, we quote temporary equipment so the space stays usable, and we schedule the permanent work in the agreed shutdown window. Emergency after-hours dispatch is $525 to $850 per event; contract clients get their agreed rates and response times.

## When repair is the wrong answer

We are a repair company, so we will say this plainly: some rooftop units should not be repaired. The signals are usually already in the file.

-   **The unit is over 15 years old and has needed two or more compressor or control repairs in the last five years.**
-   **Capacity no longer meets the load.** A unit that cannot hold setpoint on a mild day will not hold it in January, and no repair changes the size of the coil.
-   **Major components are failing together.** A seized compressor plus corroded heat exchangers plus burnt contactors is a capital decision, not a service call.
-   **The repair is a large share of the unit’s remaining value.** A $5,000 compressor on a unit worth $6,000 is not a repair decision worth making.

When that is the case, you get the math: repair cost, replacement cost, energy performance of each, expected life, and the effect of waiting six months. That comparison is the deliverable, and it goes to the owner, the property manager and the tenant if you want it to.

## Rooftop unit repair and replacement pricing

| Commercial repair | Price |
| --- | --- |
| Diagnostic call-out | $275 to $425 |
| Capacitor, contactor or control repair | $450 to $900 |
| Refrigerant leak repair and recharge | $1,100 to $2,400 |
| Compressor or condenser motor replacement | $2,400 to $5,600 |
| Emergency after-hours dispatch | $525 to $850 per event |
| RTU replacement, 5 to 10 ton | $18,000 to $34,000 installed |

Diagnostic fees are credited against the repair when you proceed with the work. Every commercial quote is a line-item document, and the readings that support it are attached.

## Troubleshooting a rooftop unit by symptom

Owners describe symptoms, not faults. Here is how the symptom descriptions we get every week actually translate into causes, and what we test first in each case.

| What the owner reports | Most likely causes | What we test first |
| --- | --- | --- |
| “No cooling at all, unit is running” | Lost refrigerant, seized compressor, tripped safeties, failed contactor | Amp draw, pressure readings, contactor and overload condition |
| “Cooling but it is warm air” | Low charge, dirty condenser coil, failed condenser fan motor, restricted airflow | Static pressure, condenser fan amperage, coil condition |
| “Runs constantly and never reaches setpoint” | Undersized unit, failed defrost control, airflow restriction, low charge | Capacity against the load, defrost termination sensors, airflow |
| “Ice on the outdoor coil in winter” | Low charge, failed defrost control, dirty coil, stuck reversing valve | Defrost controls and sensors, coil cleanliness, charge weight |
| “Short cycling” | Low charge, failing compressor, refrigerant restriction, control fault | Pressure differentials, compressor amps, control fault codes |
| “Water dripping inside the space” | Blocked condensate drain, failed float switch, incorrect coil slope | Drain line flow test, pan float switch, coil and pan condition |
| “Unit starts and stops on its own” | Failed thermostat, loose control wiring, power supply issue, bad board | Control voltage, wiring, board fault history |
| “No heat on a gas unit” | Failed igniter, flame sensor, gas valve, tripped limit, heat exchanger | Manifold pressure, ignition sequence, flame proving, limit and heat exchanger |
| “Noise from the roof” | Worn condenser fan bearing, loose sheet metal, failing blower bearing, ice shedding | Fan and bearing play, fastener torque, coil and base condition |
| “Bad smell when it starts” | Dirty coil, burnt motor windings, microbial growth in the pan | Coil and drain condition, motor winding test |

The point of the table is not that we memorised the answers. It is that a symptom list narrows the search so the first hour on site is spent testing rather than guessing, and that the readings are written down either way.

## Restaurant and retail specifics

Two property types generate most of our commercial emergency call-outs, and both have their own constraints.

**Restaurants** run harder than the nameplate suggests. A kitchen with two line cooks in a 9,000 sq ft restaurant adds significant heat to the space every hour of service, which means the cooling load changes through the day and the unit may be marginal at peak even when the load calculation says it is fine on paper. Kitchen exhaust, grease-laden air and constant door opening at the front also mean the condenser coil fouls faster and the air balance changes over time. When we service a restaurant, we look at the makeup air and the kitchen exhaust interlock as well as the unit, because a rooftop unit that is fighting a makeup air system will look like a capacity problem for years.

**Retail** has the opposite profile. Long hours of daylight and door openings make the cooling load predictable but the economizer critical. A retail RTU that cannot bring in outside air on a mild day runs its compressor against a building that does not need it, and the bill shows it as a capacity complaint when the real fault is a failed economizer damper or a miscalibrated enthalpy control. Retail also cares about noise. A failing condenser fan bearing at 60 decibels outside a store front is a landlord complaint, not a comfort complaint.

In both cases the practical requirement is the same: a same-visit fix wherever the parts allow, and temporary equipment when they do not.

## What we carry on the truck

Commercial failures are usually parts failures, and the difference between a same-visit repair and a second visit is what is on the vehicle. Every commercial technician carries:

-   Run capacitors, contactors and starters in the common sizes for packaged equipment.
-   Defrost control boards, temperature sensors, freeze stats and limit switches.
-   Condenser fan motors and blower motors in the most common commercial frame sizes.
-   Igniters, flame sensors and gas valve repair parts for gas-fired equipment.
-   Thermostats, control boards and universal control modules.
-   R-410A and R-454B refrigerant, recovery cylinders, a scale and an electronic leak detector.

Where a specific part is not on the truck, we order it with a written ETA and a written price, and we do not leave the site with a half-repaired unit and a promise.

## Building controls and integration

Many Toronto commercial buildings have a building management system, and a rooftop unit that has been converted to BAS control is a different repair job from a standalone unit. We service economizer control and enthalpy control, outdoor air damper faults, mixed air and low-limit controls, freeze protection, and BACnet or EMS integration points, and we work alongside your controls contractor or building operator rather than around them.

Where a unit has been integrated, two things are worth knowing. First, a control fault can masquerade as an equipment fault, so the control side is tested before parts are ordered. Second, after any repair that touches the control system we set the schedules and limits back with the building operator and confirm them in writing, because a unit left in a manual override is a unit that quietly costs money for a year.

## Commercial systems we service

We work on the equipment actually found on Toronto commercial roofs and in commercial mechanical rooms:

-   **Carrier Infinity 24VNA6** and WeatherExpert packaged rooftop units.
-   **Mitsubishi Electric** packaged and heat pump rooftop equipment, including cold-climate units rated for commercial duty.
-   **Daikin** and **Fujitsu** commercial equipment where a split system or hybrid serves the space.
-   **Trane, York and Lennox** packaged units, which we service and repair even though we are not dealers for them, because a landlord does not get to change the roof of a restaurant in January.

Servicing a competitor’s equipment is normal and it is how buildings stay running. When a repair crosses the point where replacement makes more sense, we will say so and quote it honestly.

## Working with commercial landlords and restaurant owners

A commercial repair relationship runs on three things, and we will not compromise on any of them:

1.  **Speed and honesty.** We tell you what we know, what we do not, and what it will cost, in that order. Nobody likes discovering the compressor was dead at the end of a long diagnostic.
2.  **Documentation.** Readings, parts, serial numbers, refrigerant weights and warranty registrations, in a format that survives an insurance claim or an audit six months later.
3.  **Predictability.** Access coordinated with your site contact before we arrive, a written shutdown window for planned work, and a completion report the same day.

If you manage a portfolio rather than a single property, ask us about a service contract. Consolidating your commercial HVAC under one agreement with agreed response times, consolidated billing and documented reporting is worth more than the small price difference, and it removes the worst part of the job, which is chasing a contractor who has not called back.

## Duct and airflow problems that look like equipment failures

A large share of the “the AC is broken” calls we get are not equipment failures at all. They are airflow failures, and they are cheaper to fix than the owner expects, but only if somebody measures instead of guessing.

The classic list:

-   **Collapsed or disconnected flex duct.** Flex duct gets stepped on, crushed by a pallet, or disconnected when a tenant changes a partition. The unit runs fine and the space stays warm.
-   **A closed or restricted return path.** Furniture, partitions and storage in a retail back-of-house reduce return air. Airflow drops, the unit runs continuously and never reaches setpoint.
-   **A clogged or undersized filter.** Especially common in spring when a unit has been running with the cover panel off or a filter bypassed after a service call.
-   **Duct insulation failure and condensation.** A sweating or dripping duct in a ceiling can present as a water leak that gets diagnosed as a plumbing problem, right up until someone measures the static pressure.
-   **A failing fan motor or a slipped belt on older belt-driven blowers.** This one is genuinely mechanical, but it presents as an airflow problem, so we always verify amps and static pressure before quoting a motor.

This is why our diagnostic measures static pressure across the coil and the supply, checks blower motor amps, and compares both against the design figures before anything gets recommended. A repair quote built on a guess is how owners end up paying for a compressor on a unit that only needed a filter and a duct reconnect.

## What every commercial call-out checks

Whether the call is an emergency or a routine visit, the same checklist runs, because the failures that look small turn into expensive ones later:

1.  **Supply voltage and amperage under load**, on every circuit the unit uses, including the heat section on gas units.
2.  **Capacitors tested**, and contactors and safeties checked for pitting, heat damage and evidence of a previous failure.
3.  **Motor amps measured** on the compressor and blower against the nameplate, which catches a seized bearing and a failing winding before either one strands a compressor.
4.  **Refrigerant verified** with digital gauges, and superheat and subcooling logged against the manufacturer chart for the unit and the conditions.
5.  **Static pressure measured** across the coil and the supply, with filters and coils inspected and airflow verified.
6.  **Condensate path flushed and flow-tested**, pan heater and drain switch verified, and the drain line traced to make sure it actually exits the building.
7.  **Coil condition assessed** and washed where it is fouled, with fin damage and corrosion recorded.
8.  **Defrost and control sequences tested** on heat pump equipment, including the sensors, and the economizer and outdoor air dampers checked where fitted.
9.  **Fuel side verified** on gas units: manifold pressure, ignition sequence, flame sensor, heat exchanger condition and combustion analysis.
10.  **The cabinet, curb and roof penetration inspected**, because a leak at the curb is the reason the unit is failing repeatedly.

Every one of those results goes into the completion report, with readings and part numbers, so the next technician on that roof starts with the history instead of starting from scratch.

## Preventative maintenance for commercial rooftop units

The cheapest commercial HVAC repair is the one that never happens, and commercial equipment has two risk windows: the January heating peak and the July cooling peak. A pre-season visit in the fall, with a written condition report and a parts plan, is what stops a February failure.

Our commercial preventative maintenance includes the full checklist above, a condenser coil wash, a drain and pan inspection, electrical inspection and terminal torque checks, refrigerant verification with logged readings, and a written report with a condition rating, plus a recommendation on any parts we would replace before the season rather than during it.

For owners with several properties, that sits inside the portfolio contract described on our 

commercial heat pump page

[/commercial-heat-pump-toronto/ →](/commercial-heat-pump-toronto/)

, with consolidated billing and one point of contact. For a single building, it is available as a seasonal service agreement with agreed response times and emergency rates, which is usually the cheapest insurance a landlord can buy.

## Case study: emergency restaurant rooftop repair, Liberty Village

A 9,000 sq ft restaurant and bar in Liberty Village lost all cooling on a Friday evening with 180 covers booked. The unit was a 12-year-old gas rooftop unit running R-410A, and the fault was a failed condenser fan motor.

We treated it as an emergency: dispatched after hours, replaced the condenser motor and the run capacitor on the first visit, cleaned the condenser coil, verified the charge with logged superheat and subcooling readings, and had the tenant trading again by the following afternoon. The repair was $1,840, and we delivered a written repair-versus-replace recommendation for the unit with the numbers the owner’s insurer needed to see a genuine diagnosis rather than a guess.

## Get a technician on the roof

If your unit is down right now, call **(647) 277-5401**. The phone is answered 24/7, and after-hours commercial dispatch is available across 

downtown Toronto

[/service-areas/toronto-central/ →](/service-areas/toronto-central/)

, 

Etobicoke

[/service-areas/etobicoke/ →](/service-areas/etobicoke/)

, 

North York

[/service-areas/north-york/ →](/service-areas/north-york/)

 and the GTA.

If it is not an emergency but you want a plan, 

request a rooftop unit assessment

[/contact/ →](/contact/)

. We will look at the unit, measure it, and give you a written recommendation for repair, replacement or a monitored watch, with the costs on both sides.

The Problem

## What actually breaks on a Toronto rooftop unit

**1\. Failed in the middle of a service** A restaurant or retail space cannot wait for a quote. The unit has to be diagnosed on site and often fixed in the same visit.

**2\. Refrigerant masking a bigger fault** A recharge that keeps the unit running is not a repair. If the leak is not found and fixed, the compressor is the next thing to fail.

**3\. Repair bills that keep coming back** Without a written diagnostic, a landlord ends up paying for the same repair three times, on a unit that should have been replaced or genuinely repaired.

Transparent Pricing

## How much does rooftop unit repair cost in Toronto?

Commercial repair pricing for the GTA. Every call-out includes a full diagnostic, logged readings, and a written recommendation with the repair-versus-replace math before any parts are ordered.

Full Toronto price list

[/pricing/ →](/pricing/)

Commercial diagnostic call-out

$275-$425

Capacitor, contactor or control repair

$450-$900

Refrigerant leak repair and recharge

$1,100-$2,400

Compressor or condenser motor replacement

$2,400-$5,600

Emergency after-hours dispatch

$525-$850

**Commercial incentive notice:** The Enbridge HER+ and Home Renovation Savings Program are residential programs and generally do not cover commercial properties. Commercial owners may qualify for the Enbridge Energy Performance Program, utility business programs or NRCan ENERGY STAR incentives. We screen your property, file every application and track it to payment. Always "up to", never guaranteed.

Written Manual J

## Why do we run a Manual J before any quote?

Because tonnage decides everything else. Comfort at -25C, hydro bill, compressor life, rebate eligibility. A written Manual J heat loss calc per HRAI standard comes first, then Manual S equipment selection, then the price. Free, and yours to keep.

Manual J Manual S Manual D when needed HRAI standard

-   Repair-or-replace in writing If the unit is old R410A and the repair crosses the threshold, you get both prices on paper.
-   Sizing recheck on replacement Plenty of older Toronto units were oversized. Manual J tells us before we order the new one.
-   No surprise scope Diagnostic first, written quote second, work third. Nothing starts without your sign-off.

## No heat right now? Call first.

Phone answered 24/7. Same-day diagnostic dispatch for no-heat calls across Toronto and the GTA.

Get Free Load Calc

[/contact/ →](/contact/)

 

(647) 277-5401

[tel:+16472775401 →](tel:+16472775401)

Why Us

## What sets our rooftop unit repair work apart

01

### 24/7 commercial dispatch

The phone is answered around the clock and after-hours rooftop dispatch is available for no-cool and no-heat calls.

02

### Measured, not guessed

Superheat, subcool, static pressure, amp draw and voltage are measured and written down on every commercial call-out.

03

### Repair or replace, in writing

You get the numbers on both sides of the decision, including the cost of waiting, before we order anything.

04

### In-house licensed trades

Red Seal HVAC, TSSA gas technicians and ESA electricians on staff. $5M liability and WSIB coverage.

05

### Parts on the truck

Capacitors, contactors, sensors, control boards, condenser motors and igniters ride with every technician.

Side by Side

## How Toronto Heat Pump Pros Compares

| What matters | Typical Provider | Toronto Heat Pump Pros |
| --- | --- | --- |
| Diagnosis | Parts cannon, whatever is in the truck | Full diagnostic with logged readings and a written cause |
| Repair or replace | Repair first, always, decide later | Both options priced in writing before work starts |
| Refrigerant | Top up and leave | Leak found and repaired, charge verified, weights documented |
| Access | Roof access negotiated on the day | Coordinated with your site contact before dispatch |
| Paperwork | Invoice and a note | Completion report with readings, parts and warranty registration |

How It Works

## How rooftop unit repair works, step by step

Phone answered 24/7. Most repairs finish on the first visit because the common parts ride on the truck.

1.  01
    
    ### Answered and dispatched
    
    The phone is answered 24/7. We ask what the unit is doing, its tonnage, refrigerant type, fuel type and the symptoms, and we dispatch with the right parts.
    
2.  02
    
    ### On-site diagnostic
    
    Full RTU diagnostic: electrical, refrigerant, airflow, control and economizer. Every reading is measured and logged.
    
3.  03
    
    ### Written recommendation
    
    We give you the repair-versus-replace math in writing, including what happens if the unit is left alone, before any parts are ordered.
    
4.  04
    
    ### Repair on the same visit where possible
    
    Common parts ride on the truck, so capacitors, contactors, sensors, motors and controls are often replaced in the first visit.
    
5.  05
    
    ### Documented completion
    
    Readings before and after, parts fitted, warranty registration and a written completion report for your vendor file.
    

Project Case Study

## Commercial Rooftop Unit RTU Repair in Liberty Village, near King Street West and Dufferin

![Failed older heat pump outdoor unit with bent fins and rusted cabinet on a commercial roof](/images/misc/failed-older-heat-pump-outdoor-unit-with-bent-fins.webp) Before

![Same rooftop heat pump unit closed up and running normally after repair](/images/misc/same-heat-pump-outdoor-unit-closed-up-and-running-.webp) After

Liberty Village, near King Street West and Dufferin

A 9,000 sq ft restaurant lost all cooling on a Friday evening with 180 covers booked. The unit was a 12-year-old gas rooftop unit with an R-410A charge and a condenser fan motor that had failed. Because the tenant could not close, we treated it as an emergency: dispatched after hours, replaced the condenser motor and the run capacitor on the first visit, cleaned the condenser coil, verified the charge with logged superheat and subcool readings, and had the tenant trading by the following afternoon. We also documented the fault properly so the owner's insurer saw a real diagnosis rather than a guess.

Materials

Condenser fan motor, run capacitor, contactor, cleaned condenser coil, verified R-410A charge with logged readings

Home size

9,000 sq ft restaurant and bar, one 10-ton rooftop unit, dining room and kitchen on separate zones

Turnaround

Emergency dispatch the same evening, trading restored the next afternoon

Installed price

$1,840 repair, plus a written repair-versus-replace recommendation for the unit

Project brief illustrative of a typical job in this neighbourhood. Your price depends on your Manual J and site conditions.

Our Work

## Recent rooftop unit repair jobs around the GTA

Click any photo to enlarge.

Ice on the outdoor coil is a defrost or refrigerant fault, not a defrost timer fault.

Clear coil, running normally, after the fault was found.

Control board faults diagnosed on site rather than by parts cannon.

Every commercial call-out is measured, not guessed.

Recovery and disposal done properly, with the weights documented.

A clean condenser restores capacity on a marginal unit.

Proven Results

## Toronto property owners and commercial clients on our rooftop unit repair work

Real installs across Toronto neighbourhoods. Rebate captures and winter performance in the owners' own words.

> "Lost all cooling with 180 covers booked. They were on the roof that evening and we traded the next afternoon."

PSPaulo S., Liberty Village$1,840 condenser motor and capacitor repair, 10-ton RTU

> "A tenant's freezer was failing and the landlord wanted the unit fixed, not a lecture. Technician on site in 90 minutes, back in service before lunch."

JPJoanne P., Scarborough$980 emergency rooftop control repair

> "Three recharges in two years by the old contractor. These guys found the leak, fixed it and wrote down the readings. No more top-ups."

KWKen W., Etobicoke$1,650 refrigerant leak repair and recharge, 7.5-ton RTU

> "They gave me the repair number and the replacement number in writing with a five-year comparison. I replaced it and have not had a call-out since."

DMDerek M., North YorkWritten repair-versus-replace analysis, 12-year-old RTU

> "Insurance asked for documentation after the ice storm and I had a completion report with readings, parts and weights within a day."

RVRachel V., Vaughan$2,340 compressor replacement, 10-ton RTU

Reviews shown are from customer projects. Individual results and rebate amounts depend on program terms and household eligibility.

Direct Answers

## Commercial Rooftop Unit RTU Repair Toronto FAQ

Still have a question?

Phone answered 24/7. Written answers via the form within one business day.

(647) 277-5401

[tel:+16472775401 →](tel:+16472775401)

Ask in writing

[/contact/ →](/contact/)

How much does it cost to repair a rooftop unit in Toronto?

A commercial diagnostic call-out runs $275 to $425. Electrical repairs such as capacitors, contactors and controls run $450 to $900. Refrigerant leak repair and recharge runs $1,100 to $2,400, and compressor or condenser motor replacement runs $2,400 to $5,600. Emergency after-hours dispatch is $525 to $850 per event.

How do I know if my RTU needs repair or replacement?

That decision is a numbers question, so we answer it with numbers: the age of the unit, the measured capacity against the load, the repair history, the refrigerant situation and the cost of each path over the next five years. You get the comparison in writing before any parts are ordered.

Do you repair rooftop units with R-410A refrigerant?

Yes. R-410A systems in service can be repaired and recharged with R-410A. New equipment uses R-32 or R-454B, following Ontario and federal refrigerant rules, so a failed unit that is being replaced is also an opportunity to move off R-410A.

Can you come out after hours?

Our phone is answered 24/7 and we provide emergency after-hours dispatch for no-cool and no-heat calls. After-hours dispatch is $525 to $850 per event, and contract clients receive the response times written into their agreement.

Why does my rooftop unit ice up?

Ice on the outdoor coil is usually a symptom, not a fault. Common causes include a low refrigerant charge, a failed defrost control or sensor, a dirty condenser coil, a stuck reversing valve, or restricted airflow. We test for each of these rather than resetting the defrost timer and hoping.

My RTU has low airflow. Is that a repair or a duct problem?

It is usually the ducts. A failing fan motor is common, but restricted supply, disconnected or collapsed flex duct and a clogged filter or coil cause the same symptom. We measure static pressure and compare it to the design figure before recommending anything.

Do you work on economizers and building management systems?

Yes. Economizer control, enthalpy control, outdoor air damper faults, mixed air and low-limit controls, and BACnet or EMS integration are all within scope, and we coordinate with your controls contractor or building operator as needed.

Can you service a restaurant where a failure means lost covers?

Yes, and we plan for it. We diagnose and repair on the first visit wherever the parts allow, and where the unit is beyond a same-visit repair we bring temporary equipment so the dining room can stay open. Restaurants and retail are our two busiest emergency call types.

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![Technician testing inverter compressor windings with a multimeter inside the outdoor unit](/images/misc/technician-testing-heat-pump-inverter-compressor-w.webp)

From **$800**

### Heat Pump Compressor Repair Toronto

Compressor faults diagnosed properly (compressor vs inverter board), then repaired or replaced with a clear repair-vs-replace call.

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[Heat Pump Compressor Repair Toronto →](/heat-pump-compressor-repair-toronto/)

![Technician using an electronic leak detector at a flare fitting behind a ductless head](/images/misc/technician-using-electronic-refrigerant-leak-detec.webp)

From **$300**

### Heat Pump Refrigerant Leak Repair Toronto

Leak located, repaired and pressure-tested before recharge. Certified for R410A, R32 and R454B.

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[Heat Pump Refrigerant Leak Repair Toronto →](/heat-pump-refrigerant-leak-repair-toronto/)

GTA Coverage

## Rooftop Unit Repair near you

Same crews, same 5-day turnaround. Rooftop Unit Repair is booked most often in these service areas.

Heat Pump Toronto CentralRiverdale, Cabbagetown, YorkvilleView area

[/service-areas/toronto-central/ →](/service-areas/toronto-central/)

 

Heat Pump EtobicokeMimico, The Kingsway, Humber Bay ShoresView area

[/service-areas/etobicoke/ →](/service-areas/etobicoke/)

![](/images/hero/toronto-brick-semi-detached-house-at-dusk-in-light.webp)

24/7 phone. Same-day no-heat dispatch.

## No heat? We answer 24/7.

Same-day diagnostic dispatch for no-heat calls. Parts stocked for common Daikin, Mitsubishi and Fujitsu failures. Emergency winter replacement within 48 hours if it cannot be saved.

Request a callback

[/contact/ →](/contact/)

 

Call 24/7: (647) 277-5401

[tel:+16472775401 →](tel:+16472775401)

-   Rebate paperwork submitted for you
-   Workmanship warranty + manufacturer parts coverage
-   Red Seal, TSSA, ESA, HRAI in-house