No cooling at all
The system won't run, or won't respond to the thermostat.
Cooling / Air Conditioner Repair
Air Conditioner RepairClear diagnostics and dependable repairs when your cooling isn't cooling — so your home is comfortable again, properly.
— Common AC Problems
Symptoms we diagnose every summer.
If something feels off with your air conditioning, it usually is. These are the most common issues we're called out to across Toronto and the GTA.
Warm air from vents
The blower runs but the air coming out isn't cool.
Frozen evaporator coil
Ice on the indoor coil or refrigerant lines.
Refrigerant issues
Low charge, poor cooling capacity or suspected leaks.
Water leaks
Water pooling around the indoor unit or a clogged condensate line.
Electrical faults
Tripped breakers, blown fuses or failed contactors and capacitors.
Short cycling
The AC turns on and off in rapid succession without properly cooling.
Strange noises
Buzzing, rattling, grinding or hissing sounds from the equipment.
Thermostat issues
Blank displays, incorrect readings or a system that ignores schedules.
Weak or uneven airflow
Low airflow at the vents or rooms that never quite cool down.
— Our Diagnostic Process
Diagnosed properly, before it's repaired.
Good repair work begins with an honest diagnosis. Every AC service call follows the same steady process, whether the issue is simple or complex.
- 01
Inspection
A full visual review of the indoor and outdoor equipment, line set and connected controls.
- 02
Testing
Refrigerant pressures, airflow and electrical measurements to isolate the true source of the issue.
- 03
Diagnosis
A clear, plain-language explanation of what's happening and why.
- 04
Repair options
Sensible options presented honestly — including doing nothing when appropriate.
- 05
Transparent pricing
Written pricing before any work begins. No surprises on the invoice.
- 06
Testing after repair
Full verification that the system runs quietly and cools properly before we leave.
— Why Homeowners Choose Proper HVAC
Repair work you can trust.
Experienced technicians
Trained on the AC systems in your neighbourhood and the problems they tend to develop.
Clear communication
Straightforward explanations before, during and after the visit.
Quality workmanship
Repairs completed properly the first time and verified before we leave.
Respect for your home
Boot covers, drop cloths and tidy work areas — always.
Repair-first philosophy
We fix what can be fixed, and only recommend replacement when it's genuinely the better choice.
Honest recommendations
The work your AC actually needs — nothing added, nothing exaggerated.
— Repair vs Replacement
Fix it, or replace it?
Most air conditioners should be repaired, not replaced. Eventually, though, a new system becomes the better long-term investment. Here's how we think about it.
— Repair usually makes sense when
A repair keeps a good system running.
- The AC is under 10 years old
- The repair is minor or moderate in cost
- The system has been reliable overall
- Cooling performance is still acceptable
— Replacement may be the better investment when
A new system delivers real long-term value.
- The AC is 12–15+ years old
- Repair cost approaches a significant share of replacement
- Breakdowns are becoming frequent
- Cooling capacity or efficiency keeps declining
— FAQ
Frequently asked questions.
What Toronto homeowners ask us most often when their air conditioning isn't behaving.
Still not sure? Contact us and we'll help you decide the right next step.
Warm air usually points to a refrigerant issue, a frozen evaporator coil, a failed outdoor unit or a thermostat set incorrectly. A technician can identify the exact cause quickly and confirm whether it's a small fix or something more involved.
Common causes include a tripped breaker, a blown fuse in the outdoor disconnect, a failed capacitor or contactor, or a thermostat that has lost power. If checking the breaker and thermostat doesn't restore cooling, it's time to book a service call.
Most indoor water leaks come from a clogged condensate drain line, a full drain pan or a frozen evaporator coil that's melting. Shut the system off and give us a call — running it further can cause additional damage.
A frozen coil usually points to low airflow — often a dirty filter or blower issue — or a low refrigerant charge. Turn the system off, let it fully thaw and book a service visit to identify and correct the root cause.
Repair costs vary depending on the part involved and the age of the system. We provide clear, written pricing after diagnosis — before any work begins — so you can make an informed decision without pressure.
It depends on the age of the equipment, the nature of the repair and its overall reliability. Systems in the 12–15+ year range with a significant repair on the horizon are often better replaced. We'll walk through the numbers with you honestly.
Yes. Our technicians regularly service older cooling systems across Toronto and the GTA. Where a repair is safe, sensible and cost-effective, we'll do it. Where it isn't, we'll say so clearly.
We service most major residential air conditioning brands installed across Toronto and the GTA. If you have a specific make and model in mind, mention it when booking so we can confirm before dispatch.
Annual maintenance won't eliminate every possible failure, but it dramatically reduces preventable ones. Many no-cooling calls we respond to trace back to something a seasonal tune-up would have caught. ProperCare is our recommended maintenance program.
Proper HVAC provides air conditioner repair for homeowners throughout Toronto and the Greater Toronto Area, including Etobicoke, North York, Scarborough, York, Vaughan, Richmond Hill, Markham, Mississauga, Oakville and Brampton.
— Get Started
Need AC Repair?
Book a visit online, ask about financing for a larger repair or replacement, or join ProperCare for ongoing peace of mind.
Or call 416-580-HEAT (4328)