Heating · Furnace Repair
Furnace repair in Toronto and the GTA.
A furnace that won’t light, one that runs for two minutes and quits, or one blowing cold air through the vents. We find the fault first, then quote the repair.
- ★ 5.0 on Google
- 7 a.m.–9 p.m., seven days
- two-year warranty on our work
- Toronto & the GTA
What usually
turns out to be wrong.
Furnace repair is a diagnostic call before it is a parts call. A gas furnace runs the same sequence every time the thermostat asks for heat: the inducer starts, the pressure switch proves draft, the igniter glows, the gas valve opens, the flame sensor confirms a flame, and the blower comes on. If any one of those steps fails, the furnace shuts itself down rather than carrying on. Our job is to find which step stopped, and why, before anything is quoted or replaced.
It won’t light at all
The thermostat calls, something clicks in the basement, and nothing follows. Usually a failed hot surface igniter, a pressure switch that won’t make, a rollout switch that has latched, or no gas reaching the valve.
It fires, then quits a few minutes later
Short cycling. Most often a flame sensor gone dull, so the board never confirms a flame and drops the gas within seconds. A packed filter or closed vents do the same by tripping the high limit.
The vents are blowing cold
The blower is running but the burners aren’t. Either the furnace has locked out and the fan is finishing its cycle, or the thermostat fan switch is sitting on ON instead of AUTO.
A bang or a whump when it starts
Delayed ignition. Gas builds in the burner box for a second or two before it catches, and the noise is that pocket lighting all at once. Usually carboned ports, a weak igniter or a broken crossover.
Water pooling under the furnace
On a high-efficiency unit the flue gas condenses, and that water leaves through a trap and a drain line. When the trap silts up, the pressure switch trips and the water backs out onto the floor.
It runs and runs without getting there
Either the furnace isn’t making the heat it should, or the heat isn’t reaching the rooms. We measure temperature rise across the exchanger and check burner operation before anyone blames the ductwork.
What the job includes.
The full ignition sequence
We watch the unit run from the thermostat call through inducer, pressure switch, igniter, gas valve, flame proving and blower, and note exactly where the sequence stops.
Ignition and flame sensing parts
Hot surface igniters, spark and pilot assemblies on older units, flame sensors cleaned back to bare metal, and gas valves tested rather than guessed at.
Safety switches and venting
Pressure switches, rollout and high-limit switches, the inducer motor, and the intake and exhaust runs, since a blocked terminal outside stops a healthy furnace cold.
Condensate, filter and airflow
Traps and drain lines cleared, filter condition checked and temperature rise measured, because a furnace starved of return air fails in ways that look like a burner fault.
A carbon monoxide reading
We take a reading with the furnace running before we pack up, the same meter and the same habit as our fireplace work.
How the visit goes.
- 01What the furnace is doingWhat the thermostat says, what you hear from the basement, whether it lights at all. That decides what we bring out on the visit.
- 02$79.99 to diagnoseThe flat service call covers the diagnosis. We run the furnace, read the board and find the actual fault rather than starting with parts.
- 03A quote before the repairYou hear what has failed, what the part costs, what the labour is, and whether the repair is worth it on a furnace that age.
- 04Run it and check itThe repair is proved with the furnace through a full cycle, a temperature rise measured and a carbon monoxide reading taken before we leave.
From the job record.
See the full record →
On the public record
“He was personable, professional and cleaned up when he was done.”
Offers on this work.
Mention it when you book
*Some restrictions may apply. Cannot be combined with other offers.
Prefer to talk it through? Call (416) 556-8581
Furnace Repair questions.
If yours isn’t here, the phone is the fastest way to have it answered, seven days a week.
The visit starts at a flat $79.99 service call. That covers the diagnosis: we run the furnace through its sequence, read the control board and find what has actually failed. Parts and labour are quoted separately once we know, and you decide before anything is ordered or fitted. Our work carries a two-year warranty.
Before the cold snap.
Describe the fireplace that won’t light or the water heater on its last tank, and we’ll tell you what the fix takes.