Toronto Commercial HVAC repairs commercial air conditioning for offices, retail, restaurants, industrial buildings and institutions across Toronto and the GTA. That covers packaged rooftop units, split systems, ductless units, VRF and chilled water fan coils. Our 24-hour dispatch runs from May to September, when cooling failures cost the most.
Commercial AC failures follow the weather. The first week above 32C brings a wave of high-pressure lockouts from fouled condenser coils, failed condenser fan motors and capacitors that cannot start a hot compressor. Refrigerant leaks that were tolerable in May show up as frozen coils and warm offices in July. VRF systems throw fault codes for failed sensors, expansion valves and inverter boards. Fan coils in older towers lose motors and valves one floor at a time.
Repairs typically cost $450 to $3,500, plus a $185 diagnostic that is waived on repairs over $750. Refrigerant is listed by the pound on the written quote.
What Does Commercial AC Repair Cover?
Rooftop units
Cooling-side repairs on Carrier WeatherMaker, Trane Voyager, Daikin Rebel, York, Lennox and AAON units: compressors, condenser fan motors, contactors, capacitors, TXVs, coils and economizers. Deeper RTU work, including large compressors and heat sections, sits under rooftop unit repair.
Split and ductless systems
Condensing units, air handlers and ductless heads serving offices, retail units and server rooms.
VRF systems
Mitsubishi City Multi and Daikin VRV outdoor units, branch selector boxes and indoor units. We read the fault history with manufacturer service tools before replacing parts.
Chilled water fan coils
Fan coil motors, control valves, actuators, drain pans and thermostats in buildings served by a central chiller.
Common AC Failures and What They Mean
| Symptom | Likely cause | Typical repair |
|---|---|---|
| Unit runs, blows warm air | Low refrigerant, failed compressor contactor | Leak search and repair, contactor |
| Lockout every hot afternoon | Dirty condenser coil, failed fan motor | Coil cleaning, fan motor |
| Ice on the evaporator coil | Low airflow or low charge | Filters, blower, leak repair |
| Water dripping from ceiling | Plugged drain or failed pump | Drain clearing, pump |
| VRF fault code | Sensor, EEV, inverter board | Component replacement |
| One zone too warm | VAV box, damper or valve | Actuator or controller |
When Do You Need Commercial AC Repair?
- The building cannot hold setpoint in the afternoon.
- Units trip on high pressure and need repeated resets.
- Tenants report warm offices on one side of the floor.
- Ice forms on refrigerant lines or coils.
- Energy use jumps without a change in occupancy.
Repair or Replace Your Commercial AC?
Repair is the right call for most units under 15 years old. For units past 18-22 years, R-22 systems with leaks, or when a repair is more than half the cost of new equipment, we quote both. New systems are covered by our commercial AC installation team, with load calculation through commissioning.
Commercial AC Repair Across Toronto and the GTA
Summer routes cover Bay Street and King West offices, Square One and Airport Corporate Centre office parks, Hwy 404 tech campuses in Markham, Vaughan Mills and Bramalea retail, and Dixie-Mavis industrial. When an AC failure threatens product, servers or patients, our 24-hour emergency commercial HVAC repair line takes priority.
