Furnace Repair in Toronto & the GTA — Same-Day Service
Furnace not heating? Call (905) 951-8080 now. Direct Air Systems provides same-day and next-day furnace repair across Toronto, Markham, Bolton, Vaughan, Brampton, Mississauga, Richmond Hill and Newmarket. Our TSSA-licensed gas fitters carry common Lennox and universal parts on every truck — most repairs are completed in a single visit.
Common Furnace Problems We Fix
- No heat / furnace not igniting — usually a failed hot surface igniter, dirty flame sensor, or faulty gas valve. Most are same-day repairs.
- Furnace short-cycling — turns on and off repeatedly without heating the home. Common causes: blocked flue, dirty filter, faulty pressure switch, or oversized furnace.
- Blower not working — furnace fires but no air from vents. Usually a failed blower motor, capacitor, or control board.
- Cracked heat exchanger — a carbon monoxide risk requiring immediate attention. If your CO detector trips, shut down the furnace and call us immediately.
- Error codes / flashing lights — Lennox and other modern furnaces flash diagnostic codes. We read and diagnose all error codes accurately.
- Loud noises — banging, rattling, or squealing during operation usually indicates a mechanical fault in the blower or inducer assembly.
- Rising gas bills — sudden efficiency drops often mean a dirty heat exchanger, failing blower, or gas pressure issue that a tune-up can fix.
Repair vs. Replace — Our Honest Assessment
We will tell you the truth: if your furnace is over 15 years old with a failed heat exchanger or repeated breakdowns, we will recommend replacement rather than an expensive repair on aging equipment. If a repair is the right call, we will do the repair. Our technicians do not earn a commission on new equipment sales — they earn it on quality work.
- Repair makes sense: furnace under 12 years old, single fault, cost under 30% of replacement value
- Replace makes sense: furnace over 15 years old, cracked heat exchanger, multiple recent repairs, AFUE under 80%
See our furnace repair vs. replacement guide for a full breakdown, or our Lennox furnace installation page if replacement is the right call.
Annual Furnace Maintenance
Most mid-winter furnace failures are preventable. An annual fall tune-up — typically under $200 — includes combustion analysis, heat exchanger inspection, CO testing, filter replacement, and gas pressure verification. Regular maintenance also preserves your Lennox warranty, which requires annual professional service on most models.
GTA Communities We Serve
Furnace repair across the full GTA — Toronto, Markham, Bolton, Vaughan, Brampton, Mississauga, Richmond Hill, and Newmarket.
Frequently Asked Questions
How much does furnace repair cost in Toronto?
Furnace repair costs in Toronto typically range from $150–$600+ depending on the part and labour required. A diagnostic call is required to confirm the fault before any repair is quoted. Direct Air Systems provides upfront pricing before any work begins — no surprises on the invoice.
How quickly can you repair my furnace in Toronto?
We offer same-day and next-day furnace repair service across Toronto and the GTA during heating season. For mid-winter emergencies, call (905) 951-8080 directly — do not use the online form for urgent requests.
Should I repair or replace my furnace?
If your furnace is under 10 years old with a single fault, repair is usually the right call. If it is over 15 years old, has had multiple repairs in the past two seasons, or has a cracked heat exchanger, replacement is almost always the better investment. Our technicians give you an honest assessment — we will tell you if repair is not worth it.
What are the most common furnace problems in GTA homes?
The most common furnace repairs in Toronto and the GTA are: igniter failure (especially in furnaces over 8 years old), failed blower motor capacitor, cracked heat exchanger, dirty flame sensor causing random shutoffs, and faulty pressure switches on high-efficiency furnaces. Most of these are same-day fixes when parts are in stock.
Does Direct Air Systems service all furnace brands?
We service all major furnace brands including Lennox, Carrier, York, Goodman, Napoleon, and others. As an authorized Lennox Premier Dealer, we carry Lennox OEM parts locally and can complete most Lennox repairs same-day. For other brands, we typically source parts within 24-48 hours.