Furnace Repair in Ontario

Furnaces fail on the coldest night of the year. It isn't bad luck — that's when the furnace works hardest, so that's when the weak part gives out. A blower motor that had been squealing for weeks, an igniter at the end of its life, a flame sensor coated in enough residue that the burner lights and dies, lights and dies.

Gas-fired equipment in Ontario is worked on by TSSA-certified gas technicians — no exceptions, and that's how repair requests here are routed. A proper repair visit means diagnosing the actual fault rather than swapping parts on a hunch: reading the error codes, testing the sensor or motor, checking the venting, and telling you honestly whether this furnace is worth fixing.

No heat in deep winter is urgent — mark it that way. While you wait: check the thermostat batteries, make sure the furnace switch (it looks like a light switch, usually beside the unit) wasn't bumped off, and confirm the filter isn't so clogged the furnace is choking. Those three checks resolve a surprising share of 'dead' furnaces.

• No-heat diagnosis and repair
• Igniter and flame sensor replacement
• Blower motor and capacitor repairs
• Furnaces that short-cycle or won't stay running
• Strange noises — squealing, banging, rumbling
• Thermostat faults and replacement
• Error code diagnosis on modern furnaces
• Annual maintenance and safety checks

• Which part failed — a flame sensor cleaning and a blower motor are very different repairs
• Furnace age and parts availability for older models
• Urgent no-heat visits versus scheduled maintenance
• Accessibility of the furnace and its venting
• Repair-versus-replace judgement on furnaces near end of life
• Whether the fault traces back to ductwork, filter habits or thermostat rather than the furnace itself

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.