Furnace repair in Toronto and the GTA

If your furnace is not working, a few quick checks can save a service call. Confirm the thermostat is set to heat, the furnace power switch and breaker are on, the filter isn’t clogged and the blower door is closed tight. If the heat still doesn’t come back, call us.

• Set the thermostat a few degrees above room temperature and change its batteries
• Replace a clogged filter, which can overheat the furnace and shut it down
• On a high-efficiency furnace, clear snow and ice from the outside vent pipes
• Note any blinking error code on the control board

Don’t keep resetting a furnace that locks out again and again. The lockout is a safety feature, and the fault behind it needs a technician.

Most furnace breakdowns trace back to a short list of parts: the flame sensor, the hot surface ignitor, the pressure switch, the inducer and blower motors, and the control board. A clogged filter or a blocked condensate line causes a surprising share of no-heat calls on its own.

Every furnace 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. Nothing gets fixed until you approve that price, and common parts ride on the truck.

• Book online or by phone with the symptoms, any error codes and the furnace’s age.
• A real person calls back to confirm your window. No-heat calls go to the front of the line.
• We test the ignitor, flame sensor, pressure switches, gas valve, control board and blower.
• You approve a flat-rate price, with the replacement price beside it on older furnaces.
• We make the repair, then run a full heating cycle and check the safety controls.

For emergency furnace repair in Toronto, call us any time. No-heat emergencies are answered 24/7 and go to the front of the line. If you smell gas or a carbon monoxide alarm sounds, it’s a safety emergency first and a repair second, so start with these steps.

• Smell gas: leave the house right away, without flipping switches or using your phone inside. From outside, call Enbridge Gas at 1-866-763-5427, then call us once they’ve made it safe.
• Carbon monoxide alarm: get everyone outside and call 911 before anything else.
• Never heat the house with a gas stove, oven or barbecue.

Ontario requires carbon monoxide alarms in homes with fuel-burning appliances. The province’s carbon monoxide safety page (opens in a new tab) has more on the rules.

Furnace repair cost in Toronto depends on the part that failed, the furnace’s make and age, access to the unit and whether the part is on the truck. There’s a flat diagnostic fee, which we tell you before booking, then a flat-rate repair price you approve before any work starts.

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

Repair usually makes sense when the furnace is under about 15 years old and the fault is a single part like an ignitor or flame sensor. Furnace replacement starts to make sense at 15 to 20 years, when a major part such as the heat exchanger or control board fails.

We give you both prices side by side and tell you which we’d choose for our own home. A cracked heat exchanger can leak carbon monoxide, so that’s the one case where we won’t recommend keeping the furnace running.

Good furnace installation in Toronto starts with a heat-loss calculation, not the size printed on the old furnace. We measure the house and check the ductwork and venting, so the new furnace runs long, steady cycles instead of short bursts that waste gas.

Sizing with a load calculation

Many older furnaces were oversized, and homes have since gained insulation, new windows or a finished basement. An oversized furnace short cycles, while an undersized one runs nonstop on the coldest nights. A room-by-room load calculation gets the size right.

Venting, permits and the install day

A high-efficiency furnace vents through plastic pipe out a side wall and needs a condensate drain. If a gas water heater shared the old chimney, the chimney may need a liner. We handle any required permit and remove the old unit, and most straightforward swaps take one day.

Gas work in Ontario is overseen by the TSSA (opens in a new tab), and ours is done by TSSA-certified gas technicians. If your central air is the same age, our air conditioning team can price a matched replacement too.

AFUE, or annual fuel utilization efficiency, is the share of the gas a furnace turns into heat for your home over a season. A high-efficiency furnace is a condensing model rated 90% AFUE or higher, so most of the fuel you pay for heats the house instead of going up the vent.

Two-stage and modulating furnaces run on low most of the time. Paired with a variable-speed ECM blower, they run quieter and heat more evenly than a single-stage model.

A yearly furnace tune-up, ideally in fall, cleans the burners and flame sensor, inspects the heat exchanger, tests the safety controls and measures gas pressure. It catches worn parts before they fail in the cold, and many manufacturers require yearly maintenance to keep the warranty valid.

Our maintenance plan includes a fall furnace tune-up and a spring AC tune-up every year, with priority booking when the first cold snap fills everyone’s schedule. Between visits, check a standard 1-inch filter monthly and change it when it looks dirty.

Cold rooms and dry winter air aren’t always a furnace fault. Often the furnace is fine and the problem is airflow, ductwork or humidity, so we check airflow before recommending a bigger furnace, which can make uneven heat worse instead of better.

Fixes include balancing dampers, sealing leaky duct joints, adding a return or zoning a finished third floor. For static shocks and dry skin, a furnace-mounted humidifier from our indoor air quality service keeps winter humidity in a healthy range.

Furnace repair in Toronto looks different from one street to the next. A century semi in Leslieville or Riverdale might squeeze the furnace, water heater and laundry into one tight basement room, while a bungalow in Etobicoke or Scarborough may still run on its original ductwork.

We work in houses, townhouses and low-rise condos across the city, and we also serve the rest of the GTA, including North York, Richmond Hill, Vaughan, Markham, Mississauga and Oakville, with the same flat-rate pricing.

We service and repair every major furnace brand found in Toronto homes, including Lennox, Carrier, Trane, Goodman, Rheem, Bryant, Amana, Daikin, York and Napoleon. A builder-grade furnace in a newer subdivision gets the same careful diagnosis and flat-rate price as a premium modulating model.

When it’s time to replace, we recommend equipment based on your home’s heat loss, ductwork and budget.