Thornhill Furnace Repair

• Same-day repairs: We’re based in Richmond Hill, right next to Thornhill, so most repair calls get a visit the same day.
• Licensed & TSSA registered: Our G2 gas technicians repair all furnace and AC brands.
• Upfront flat-rate pricing: You get the price before any work starts. No surprises on the bill.
• Warranty you can count on: 1 year on labour, manufacturer warranty on new equipment, and a 10-year parts warranty on Lennox installs.
• 30 years in York Region: Highly rated on Google by our customers.

From the field: furnace repair in Thornhill

A Thornhill homeowner called us because their furnace kept shutting off before the house reached the temperature on the thermostat.

What we found: The furnace was overheating and tripping its safety limit switch. The cause was a heavily clogged air filter that was choking off airflow through the system.

How we fixed it: We replaced the dirty filter, inspected the blower assembly, checked the airflow, and ran the furnace through a complete heating cycle.

The result: Proper airflow restored and reliable heat back in the home. A clogged filter is one of the most common causes of this problem. Here’s how often to change your furnace filter.

Areas we serve in Thornhill

We service homes across Thornhill, including Thornhill Woods, Old Thornhill, Bayview Glen and Royal Orchard, as well as nearby Richmond Hill, Vaughan and Markham.

Heating and cooling in Thornhill homes

Thornhill is one of the older parts of York Region, with many houses built in the 1960s, 70s and 80s. In a home of that age the furnace and air conditioner have usually been replaced at least once, but the ductwork is often original. That matters when one room will not heat or cool properly, because the cause can be airflow and not the equipment. Before paying for a new part or a new system, it is worth having both checked.

Common AC problems we fix in Thornhill

Hot, humid summers are hard on central air conditioners. These are the problems we see most often in Thornhill:

• Blowing warm air: often a refrigerant leak, a dirty coil or a failed electrical part.
• AC won’t turn on: usually a bad capacitor or contactor, a tripped breaker, or a thermostat problem.
• Water leaking near the furnace: usually a clogged condensate drain line.
• Weak airflow: a dirty filter, a frozen indoor coil or a blower problem.
• Strange noises: worn fan motors, loose parts or debris in the outdoor unit.
• Running nonstop or turning on and off: a dirty outdoor coil, low refrigerant or a thermostat issue.

We find the cause and give you an upfront flat-rate price before any work starts. Our guide AC running but not cooling? explains the first things to check.

Furnace and AC repair in Thornhill: common questions

Do you offer same-day furnace repair in Thornhill?
Yes, for most repair calls. We’re based in Richmond Hill, right next to Thornhill, so we can usually visit the same day. We’re open 8am to 8pm, 7 days a week.

How much does furnace or AC repair cost?
We use upfront flat-rate pricing. You get the price before any work starts, so there are no surprises on the bill.

Do you repair all brands?
Yes. Our G2-licensed, TSSA-registered technicians repair all furnace and central AC brands. For new installs, we put in Lennox and KeepRite equipment.

What warranty do you give?
1 year on labour, the manufacturer’s warranty on new equipment, and a 10-year parts warranty on Lennox installs.

Should I repair or replace my old furnace?
It depends on the furnace’s age, how often it breaks down, and the repair cost. We’ll give you an honest recommendation, and our guide Repair or replace your old furnace? explains how to decide.

Do you offer 24-hour emergency service?
No. We’re open 8am to 8pm every day. Call 416-791-1609 during those hours and we’ll get to you as quickly as we can.