Markham pricing
Furnace Repair Cost in Markham
$180 – $1,200per repair
Most GTA furnace repairs come in between $180 and $1,200 including the diagnostic. Igniters, flame sensors and pressure switches are inexpensive parts and sit at the low end; blower motors, control boards and gas valves carry the real cost.
Rear-lane and narrow-lot homes in Cornell and Berczy add access time for anything involving exterior equipment or roof work. In the heritage districts, material matching — mortar, brick, flashing detail — is the cost driver rather than labour hours.
Instant Price Estimator
Furnace Repair Cost · Markham
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Price breakdown
What each price band actually buys in Markham
Quotes for the same job differ because the scope differs. This is what separates a low quote from a high one.
| Tier | Price range | What it includes |
|---|---|---|
| Minor | $180 – $350 | Diagnostic plus flame sensor, thermocouple, capacitor, filter or a thermostat fault. |
| Common | $350 – $650 | Hot-surface igniter, pressure switch, limit switch, inducer bearing, drainage or condensate repair. |
| Major | $650 – $1,200+ | Blower motor with ECM module, integrated control board, gas valve, or inducer motor assembly. |
Ranges reflect current Toronto & the GTA market pricing and are not a quote. Your written price is confirmed on site before work begins.
The detail
How furnace repair cost is priced
The diagnostic fee covers a full electrical, gas-pressure, draft and safety-control test — not a glance at the unit. On a no-heat call that fee is credited against the repair when you go ahead the same visit, which is how most of our winter calls run.
Repairs that look identical on paper can price differently because of parts availability. A ten-year-old mainstream unit has stocked parts; an orphaned brand or a discontinued proprietary board may need to be sourced, and that changes both the price and the timeline. We tell you which situation you're in before you commit.
A furnace that has needed three repairs in two heating seasons is telling you something. When cumulative repair cost passes a third of replacement cost on a unit past 15 years, we lay out both numbers rather than keep selling parts.
In Markham, Cornell, Berczy Village, Cathedraltown and Box Grove are planned post-1995 communities with rear-lane garages, narrow lots and mechanical rooms designed to the minimum footprint. Unionville and Main Street Markham hold protected heritage properties where any exterior work has to respect the original materials. That shows up directly in what this job costs here compared with the rest of the GTA.
What pushes the price up
- After-hours, weekend and holiday emergency dispatch
- ECM and variable-speed blower motors versus standard PSC motors
- Proprietary or discontinued parts that must be sourced
- Systems that have gone several seasons without a tune-up, where one fault has caused another
What brings it down
- Booking during business hours instead of overnight where safe to wait
- An annual tune-up, which catches most igniter and pressure-switch failures before they strand you
- Having the model and serial number ready so the right part is on the truck
FAQ
Furnace Repair Cost questions we get asked
How much does furnace repair cost in Toronto?
Most repairs land between $180 and $1,200 including diagnosis. Flame sensors and capacitors sit near the bottom; blower motors, gas valves and control boards near the top.
Is there a call-out fee for furnace repair?
Yes — a diagnostic fee covers the full safety and electrical test. It is credited toward the repair if you approve the work on the same visit.
How much is an emergency furnace repair at night?
Expect roughly 25% above daytime rates for after-hours, weekend and holiday dispatch. No-heat calls in freezing weather are treated as emergencies.
Why is my furnace blowing cold air?
Most often a failed igniter or flame sensor, a tripped limit switch from restricted airflow, or a condensate blockage locking out the unit. All three are diagnosable in one visit.
When is a furnace not worth repairing?
When the unit is 15+ years old and the repair exceeds about a third of replacement cost, or when the heat exchanger is cracked. A cracked exchanger is a carbon monoxide risk and the unit must be shut down.
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