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AC repair in Toronto central air conditioner beside a home
Repair, replacement, tune-ups

AC repair in Toronto and the GTA

Assurance HVAC handles AC repair in Toronto and across the GTA, from central air conditioners blowing warm air to frozen coils and leaking drains. Our 313A-certified mechanics find the real fault, handle refrigerant to code and give you a flat-rate price before any work starts. If your air conditioner is near the end of its life, we’ll also price a heat pump that cools and heats with one system.

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Key takeaways

  • AC repair in Toronto and across the GTA, plus replacements and tune-ups on all major brands.
  • Work done by 313A-certified AC mechanics, WSIB covered and fully insured.
  • A flat-rate price after diagnosis, approved by you before any work starts.
  • No-cooling calls answered 24/7. Every visit gets a two-hour arrival window and a text.
  • A written workmanship warranty on every job. Book online or call to get started.

Last updated . Written and reviewed by the Assurance HVAC service team.

On this page
  1. Signs you need AC repair in Toronto
  2. AC not cooling? What to check first
  3. Common air conditioner problems and what causes them
  4. AC repair in Toronto: what happens on a visit
  5. AC refrigerant: R-22, R-410A and newer refrigerants
  6. Why is my AC frozen or leaking water?
  7. Repair or replace your air conditioner?
  8. AC installation in Toronto: sizing, line sets and placement
  9. SEER2 and AC efficiency ratings explained
  10. Emergency AC repair in Toronto and safety first steps
  11. How much does AC repair cost in Toronto?
  12. AC tune-up and maintenance
  13. Central air conditioning in Toronto homes
  14. Air conditioner brands we service
  15. Air conditioning questions

Signs you need AC repair in Toronto

Book an air conditioner repair when the system runs but the vents blow warm air, the outdoor fan won’t spin, ice forms on the lines or water pools near the furnace. These problems tend to get worse in the next heat wave, and fixing them early usually means a smaller repair.

  • The AC runs but the air from the vents is warm
  • The outdoor unit hums but the fan doesn’t spin
  • Ice on the copper lines or the indoor coil
  • Water pooling around the furnace or indoor unit
  • The house feels sticky even when it’s cool
  • The breaker trips when the AC starts

AC not cooling? What to check first

If your AC is not cooling, check a few things before you call. Make sure the thermostat is set to cool and below room temperature, the filter is clean, the breakers and outdoor disconnect are on, and nothing is blocking the outdoor unit. If it still blows warm air, call us.

  • A clogged filter starves the indoor coil of air and can freeze it
  • Leaves, plants and patio furniture around the outdoor unit choke its airflow

Common air conditioner problems and what causes them

Most air conditioner repair calls come down to a few parts: a failed capacitor or contactor, a dirty outdoor coil, low refrigerant from a leak or a blocked condensate drain. Some are quick fixes, and a few are signs the system is near the end of its life.

Common air conditioner problems, likely causes and typical fixes
ProblemLikely causeTypical fix
Warm air from the ventsFailed capacitor, dirty outdoor coil or low refrigerantReplace the capacitor, clean the coil, repair the leak
Outdoor unit hums, fan won’t spinFailed run capacitor or condenser fan motorReplace the capacitor or fan motor
Ice on the lines or coilLow airflow or low refrigerant chargeRestore airflow, check the charge, repair any leak
Breaker trips on start-upWeak capacitor or a failing compressorTest the start parts and compressor

AC repair in Toronto: what happens on a visit

Every AC repair visit follows the same steps. We confirm a two-hour arrival window, text you when the technician is on the way, find the actual fault and give you a flat-rate price to approve. If there’s a refrigerant leak, we find it before adding refrigerant.

  • Book online or by phone with the symptoms and the unit’s age.
  • A real person confirms your window. No-cooling calls go to the front of the line.
  • We check the capacitors, contactor, fan, refrigerant charge and condensate drain.
  • You approve a flat-rate price, with the replacement price beside it on older systems.
  • We make the repair, usually that visit, then test the system under load.

AC refrigerant: R-22, R-410A and newer refrigerants

The refrigerant in your air conditioner affects what a repair costs. R-22, used in older systems, is no longer produced, so recharging one is expensive. R-410A has been the standard in newer systems for years, and new equipment is moving to refrigerants with a lower impact on the climate.

Refrigerant doesn’t get used up, so a low charge means a leak. Our 313A-certified mechanics find and fix the leak before recharging, and handle old refrigerant to code.

An older system can’t simply switch to a newer refrigerant, so a major leak on an R-22 unit is usually the point to compare a new AC with a heat pump.

Why is my AC frozen or leaking water?

Ice on an air conditioner usually means the indoor coil is running too cold, from low airflow or low refrigerant. Water around the furnace usually means a blocked condensate drain. Both are common in humid Toronto summers, and both get worse if the system keeps running.

Frozen evaporator coil

Turn the AC off, since running it frozen can ruin the compressor. Leave the fan on to thaw the coil and change the filter. If it freezes again, it needs a technician.

Condensate leaks

Algae, dust or a failed condensate pump can back water up onto the floor. We clear the line and check the drain pan and pump.

Repair or replace your air conditioner?

Repair usually makes sense when the air conditioner is under about 12 years old and the fault is a single part like a capacitor or fan motor. Air conditioner replacement makes more sense at 12 to 15 years, when it needs a compressor or major leak repair, or still runs on R-22.

Repairing versus replacing a central air conditioner
SituationRepair usually makes senseReplacement usually makes sense
AgeUnder about 12 years12 to 15 years or older
Type of failureCapacitor, contactor, fan motor or drainCompressor, outdoor coil or a major leak
RefrigerantR-410A with a fixable leakAn R-22 system that needs refrigerant
Repair historyFirst problem in yearsRepeat repairs every summer

We give you both prices side by side and tell you which we’d pick for our own home.

AC installation in Toronto: sizing, line sets and placement

Good AC installation in Toronto starts with a load calculation, not the size of the old unit. We size the new central air conditioning system to your home, match it to your furnace blower and coil, and plan the line set, drain and outdoor unit location before we quote.

Sizing and matching

An oversized AC cools fast but shuts off before it removes humidity, leaving the house cold and clammy. An undersized one runs nonstop on the hottest days.

Line sets, placement and permits

We check whether the existing line set can be reused, then pressure test and evacuate the system. In tight Toronto side yards, we place the outdoor unit where it gets airflow and room for service. We handle any required permit and remove the old unit.

If your furnace is the same age, our furnace team can quote a matched replacement too.

SEER2 and AC efficiency ratings explained

SEER2 measures how much cooling an air conditioner delivers for the electricity it uses over a season, and a higher number means lower running costs. It replaced the older SEER rating with a tougher test that better reflects real ductwork, so a SEER2 number reads a little lower for the same unit.

How single-stage, two-stage and variable-speed air conditioners compare
TypeHow it runsHumidity controlEfficiency
Single-stageFull output every time it startsBasicLower SEER2
Two-stageLow most of the time, high on hot daysBetterMid-range SEER2
Variable-speedAdjusts output in small stepsBestHighest SEER2

ENERGY STAR certified models beat the minimum efficiency standard. ENERGY STAR Canada (opens in a new tab) explains what the label means.

Emergency AC repair in Toronto and safety first steps

For emergency AC repair in Toronto, call us any time. No-cooling calls are answered 24/7 and go to the front of the line, which matters most for babies, older relatives and anyone with a health condition during a heat wave. Some situations need safety steps first.

  • Burning smell or smoke: turn the AC off at the breaker, and call 911 if you see smoke or fire.
  • Smell gas: leave the house right away without flipping switches or using your phone, and call Enbridge Gas at 1-866-763-5427 from outside.
  • Carbon monoxide alarm: get everyone outside and call 911. A gas water heater runs all year, so keep alarms working.

While you wait, close blinds on sunny windows and keep everyone on the lowest floor.

How much does AC repair cost in Toronto?

The cost of AC repair in Toronto depends on the part that failed, whether there’s a refrigerant leak, the unit’s age and how easy it is to reach. There’s a flat diagnostic fee, which we tell you before booking, then a flat-rate repair price you approve before work starts.

What affects the cost of air conditioner repair and replacement
FactorWhy it matters
The part that failedA capacitor or contactor is a small job. A fan motor, coil or compressor costs more.
Refrigerant leaksFinding the leak takes time, and R-22 costs the most to recharge.
Equipment choice (replacement)Capacity, SEER2 rating and single-stage, two-stage or variable-speed.
Line set, coil and electrical (replacement)Replacing the lines or indoor coil adds time and material.

Whatever the job, the price you approve doesn’t change halfway through.

AC tune-up and maintenance

A yearly AC tune-up, ideally in spring before the first hot week, cleans the outdoor coil, checks refrigerant pressures and electrical parts, clears the drain line and tests the system under load. It catches weak capacitors and slow leaks before a heat wave turns them into breakdowns.

Our maintenance plan includes a spring AC tune-up and a fall furnace tune-up every year, with priority booking during heat waves. Between visits, keep the outdoor unit clear and change the filter regularly.

Central air conditioning in Toronto homes

Central air conditioning in most Toronto homes means an outdoor condenser paired with a coil on top of the furnace, sharing the same ducts. Older homes and additions often have ductwork that was never designed for cooling, which is why upstairs and third-floor rooms run hot.

The fix might be better airflow, an added return or a ductless mini-split for the top floor. For stuffy rooms, our indoor air quality service adds filtration and HRV or ERV ventilation. We also serve the rest of the GTA, including North York, Richmond Hill, Vaughan, Markham, Mississauga and Oakville.

Air conditioner brands we service

We repair and maintain every major air conditioner brand found in Toronto homes, including Lennox, Carrier, Trane, Goodman, Rheem, Bryant, Amana, Daikin, York, Napoleon and Mitsubishi. The diagnosis and the flat-rate pricing are the same whatever name is on the unit.

FAQ

Air conditioning questions

Why is my AC running but not cooling?

The usual causes are a clogged filter, a failed capacitor, a dirty outdoor coil or low refrigerant from a leak. Change the filter, check the breakers and make sure the outdoor unit is clear. If it still blows warm air, turn it off and book a technician.

How often should an air conditioner be serviced?

Once a year, ideally in spring before the first hot week in Toronto. A tune-up cleans the outdoor coil, checks the refrigerant charge and electrical parts, and clears the condensate drain. Our maintenance plan includes a spring AC tune-up and a fall furnace tune-up.

Can you add air conditioning to a home without ducts?

Yes. Ductless mini-split heat pumps cool single rooms or a whole house without ductwork, and they heat too. They suit older Toronto homes with radiators, third-floor bedrooms and additions the original ducts never reached. We size them room by room before we quote.

My AC uses R-22. Can it still be repaired?

Often, for small repairs like a capacitor or fan motor. But R-22 is no longer produced, so any repair that needs refrigerant is expensive. If an R-22 system has a leak or a failing compressor, replacing it with a new air conditioner or a heat pump usually makes more sense.

How long does a central air conditioner last?

Most central air conditioners last 12 to 15 years. Yearly maintenance and regular filter changes help a system reach the top of that range. Past 12 years, if your AC needs a compressor or a major refrigerant repair, compare the repair price with a replacement.

Why is there water around my furnace in summer?

Your air conditioner removes moisture from the air, and that water drains through a pan and condensate line, sometimes with a small pump. If the line clogs or the pump fails, water backs up onto the floor. Turn the AC off and call us to clear the drain.

Should I replace my AC with a heat pump?

It’s worth comparing when your air conditioner is due for replacement. A heat pump cools exactly like an AC and also heats your home in spring, fall and much of the winter, with your furnace as backup. Ontario’s Home Renovation Savings Program offers rebates on eligible heat pumps.

Do you offer emergency AC repair on weekends?

Yes. No-cooling calls are answered 24/7 and go to the front of the line during Toronto heat waves. When we call back, we confirm a two-hour arrival window and text you when the technician is on the way. You approve a flat-rate price before any work starts.

Book a visit

Need air conditioning service? We’ll call you back to book.

Send the form or call. You’ll get a confirmed arrival window and a price before any work starts.

(416) 555-0142

No-heat and no-cooling emergencies answered 24/7

Request a technician

Tell us what’s going on. We’ll call to confirm a time.

What do you need?
How soon? Optional
Add an email or detailsOptional

Or call (416) 555-0142Used only to book your visit. Privacy