Furnace Repair in Markham
Furnace down in Markham? Our TSSA-certified technicians deliver same-day and 24/7 emergency furnace repair with flat-rate quotes and no overtime fees. Markham blends established homes in Unionville and Thornhill with newer builds in Cornell and Greensborough, so we service everything from aging systems to high-efficiency equipment.
Markham Furnace Repair Services
No heat and no-start faults
Fast diagnosis when your furnace stops producing heat, any hour of the day or night.
Ignitor and flame sensor
Cleaning or replacement of faulty ignitors and flame sensors, a leading no-heat cause in Ontario winters.
Blower motor and airflow
Repair of noisy, weak, or failed blower motors to restore even, quiet airflow.
Gas valve and safety controls
TSSA-licensed diagnosis of gas valve, pressure switch, and safety-lockout faults.
Thermostat and control board
Wiring, calibration, and replacement of thermostats and control boards.
Brand fault codes
Reading and clearing Lennox, Carrier, Goodman, and other manufacturer error codes.
Zoned and Two-Furnace Homes in Markham
Markham has an unusual share of homes large enough to run two furnaces or a single furnace split across zones, particularly around Angus Glen, Cathedraltown and the larger Unionville lots. When one part of the house goes cold, the instinct is to assume the furnace has failed. Often the equipment is fine and one zone has stopped calling for heat.
We establish which system or zone is actually down before opening anything. That means checking each thermostat, each zone damper and each zone board separately, then confirming whether the furnace itself is responding. It is a longer diagnostic than a single-system house needs, and it saves you from paying to replace a furnace that was never the problem.
Typical Pricing in Markham
| Service | Price Range |
|---|---|
| Diagnostic and service call | $129 (applied to the repair) |
| Most common furnace repairs | $150 to $600 |
| Ignitor or flame sensor | $180 to $350 |
All prices include labour. Flat-rate quotes provided before work begins. No hidden fees.
Serving All Markham Neighbourhoods
EcoFrost provides same-day HVAC service across Markham. From older homes to new builds, our TSSA-certified technicians know local equipment and climate demands.
Frequently Asked Questions about Furnace Repair in Markham
How fast can you reach Markham for a furnace emergency?
Markham is fully within our service area. For emergencies we typically arrive within 2 to 4 hours, and we operate 24/7, 365 days a year.
What does furnace repair cost in Markham?
Most furnace repairs in Markham range from $150 to $600. We provide a flat-rate quote before any work begins, with no overtime charges on evenings or weekends.
Are your technicians TSSA-certified?
Yes. Every EcoFrost technician is TSSA-licensed for gas appliance work in Ontario, and we are an authorized Lennox dealer.
Should I repair or replace my furnace?
If your furnace is under 12 years old and the fault is minor, repair usually makes sense. For older units with a major fault, we show you both repair and replacement costs so you can decide.
Half my Markham house is cold but the other half is fine. Is the furnace broken?
Probably not. If your home is zoned or runs two furnaces, which is common in the larger Markham neighbourhoods, one zone losing heat points at that zone rather than at the whole system. A failed zone damper motor, a dead zone board channel or a thermostat that has lost its connection will all produce exactly this. We test each zone independently so you find out which before spending anything.
Do you service homes with two separate furnaces?
Yes, and we price the diagnostic on the system that is down rather than treating it as two calls. Two-furnace homes need the technician to confirm which unit serves which part of the house first, because the ductwork split is not always obvious and the labels, where they exist, are often wrong.
Do you charge more to diagnose a zoned system?
No. The diagnostic is the same flat $129 whether the house has one zone or four, and it is waived if you go ahead with the repair. A zoned house takes longer to work through because each zone has to be proved independently, and we absorb that rather than billing you for the extra time it takes to be sure.
Do you service all Markham neighbourhoods?
Yes. We cover Unionville, Cornell, Berczy Village, Markham Village, Milliken Mills, Thornhill, Cathedraltown, and every Markham community with same-day and emergency service.
Ready to Book? We Serve Markham 24/7
TSSA-certified. $0 overtime fees. Same-day service available across Markham and surrounding areas.
More HVAC help in Markham
Related EcoFrost pages for Markham homeowners.