Furnace Repair in Toronto & the GTA

We start every furnace call with a full combustion and safety check, not just a fix for the symptom you reported. That means testing the heat exchanger for cracks, verifying gas pressure against the manufacturer's spec, checking flue draft and confirming the limit and pressure switches are operating inside their ranges. A furnace that heats but vents improperly is more dangerous than one that will not start at all.

Once the cause is identified, you get a written price before we touch a part. If a repair does not make financial sense against the age and condition of the unit, we tell you plainly and show you the numbers rather than quietly replacing components on an appliance near the end of its life.

The failures we see cluster by age. Under eight years old, a no-heat call is usually a flame sensor, a pressure switch tripped by a blocked intake, or a condensate drain that has backed up and shut the unit down on a safety. Past twelve years, the same symptom is more often an inducer motor, a control board, or a heat exchanger that has finally opened up. Knowing which band your furnace is in changes what we test first and how much of your time we spend on it.

We also record what the furnace was doing before it stopped. Static pressure, temperature rise across the exchanger, gas manifold pressure and flame current are numbers, and numbers tell you whether the part that failed was the problem or a symptom of something upstream. A furnace that eats igniters is not an igniter problem — it is usually restricted airflow or a cracked exchanger cooking the ignition circuit, and replacing the igniter alone means you call us again in six weeks.