Furnace Repair
London's most trusted furnace repair service. TSSA-licensed gas fitters, 2-hour emergency response, and upfront pricing with no surprises.
When your furnace stops working in a London, Ontario winter, every hour matters. Corner Gas HVAC responds within 2 hours for emergency furnace repair calls across London, Middlesex County, and the surrounding region. Our TSSA-licensed gas fitters diagnose all makes and models of gas furnaces, including Ruud, Napoleon, Keeprite, Carrier, Lennox, Goodman, and more, and carry the most common OEM replacement parts on every service van so most repairs are completed in a single visit. We've earned 4.4 stars across 38 Google reviews because we show up on time, explain the problem in plain language, and never recommend a repair you don't actually need.
Why Choose Corner Gas HVAC
- TSSA-licensed gas fitters certified to legally perform gas furnace repairs in Ontario
- 24/7 emergency furnace repair in London, ON with an average 2-hour response time
- Written upfront quote before any work begins. No hidden fees or after-the-fact charges.
- OEM parts for Ruud, Napoleon, Keeprite, Carrier, Lennox, Goodman & American Standard on every van
- Up to 10-year parts and labour warranty on qualifying furnace repairs
- Honest repair-or-replace guidance. We show you the numbers and you make the call.
- Serving London, St. Thomas, Strathroy, Komoka, Dorchester, Ingersoll & all of Middlesex County
Furnace Repair in London, ON: What We Diagnose and Fix
Corner Gas HVAC repairs every common gas furnace failure London homeowners encounter: faulty ignitors and flame sensors, cracked heat exchangers, failed blower motors, tripped high-limit switches, inducer motor failures, gas valve faults, and control board failures. We use professional diagnostic tools to identify the root cause rather than just the visible symptom, so the repair holds long-term. Because our vans are pre-stocked with OEM parts for all major brands, the vast majority of London furnace repairs are completed in a single visit.
How Much Does Furnace Repair Cost in London, Ontario?
Furnace repair costs in London, ON typically range from $150 to $800 depending on the component and labour involved. Common repairs: ignitor replacement $150–$250; flame sensor $120–$200; capacitor $100–$175; blower motor $350–$600; control board $400–$700. Corner Gas HVAC provides a written, itemised quote before any work begins. You see the price, approve it, and then we fix it. There are no hourly billing surprises and no add-ons discovered after the job.
24/7 Emergency Furnace Repair in London and Middlesex County
A furnace breakdown in a London, Ontario winter is a health and safety emergency, especially for households with young children or elderly residents. Corner Gas HVAC offers round-the-clock emergency furnace repair with an average 2-hour response time across London, St. Thomas, Strathroy, Komoka, Dorchester, Ingersoll, Woodstock, Aylmer, Lucan, Thorndale, Port Stanley, and Grand Bend. Call (519) 649-0166. A live technician answers every call, not an automated system.
Furnace Repair vs. Replacement: Transparent Guidance
London homeowners frequently ask whether to repair or replace an ageing furnace. Our guidance: if the unit is under 12 years old and the repair is under $500, repair almost always delivers better value. If it's over 18 years old, has a cracked heat exchanger (a carbon monoxide hazard), or has required two or more repairs in the past two seasons, replacement is the smarter investment. We will walk you through both options with real pricing, including available Ontario Enbridge rebates on high-efficiency replacements, and let you decide without any pressure.
Our Work
Service Details
Response Time
Within 2 hours for urgent calls
Service Area
London, ON & surrounding areas
Warranty
Up to 10 years parts & labour
Certified Technicians
Licensed gas fitters in Ontario
Get a Free Quote
Call us now or fill out the form for a no-obligation quote on your furnace repair needs.
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We're available around the clock for emergency HVAC repairs. Don't wait, call us now.
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Your Furnace Repair Questions, Answered
Still have questions?
Give us a call and one of our friendly technicians will be happy to help, no pressure, no obligation.
Call (519) 649-0166Most furnace repairs in London range from $150 to $600 depending on the part and labour involved. Common repairs like replacing an ignitor ($150–$250) or flame sensor ($120–$200) are on the lower end. More complex repairs involving the heat exchanger or blower motor can run $400–$800. We provide a written quote before any work begins.
We aim to respond within 2 hours for urgent furnace calls in London and surrounding areas. For 24/7 emergency service, call us directly at (519) 649-0166 and we'll dispatch a technician as quickly as possible.
Cold air from a furnace is usually caused by an overheated system that has shut off the burners as a safety measure, a faulty flame sensor that can't detect the burner flame, a tripped limit switch, or a problem with the thermostat settings. Our technicians can diagnose the exact cause quickly.
Short-cycling, when the furnace turns on and off repeatedly, is often caused by a dirty air filter restricting airflow, an overheating heat exchanger, a faulty flame sensor, or an oversized unit. It wastes energy and puts extra strain on the system. We recommend calling for service before it leads to a complete breakdown.
Yes. A cracked heat exchanger can allow carbon monoxide to leak into your home's living space, which is a serious safety hazard. If you suspect a cracked heat exchanger, or if your CO detector has gone off, turn off the furnace and call us immediately. We'll inspect it and advise on repair or replacement.
We service all major brands including Ruud, Napoleon, Keeprite, American Standard, York, Carrier, Lennox, Goodman, Bryant, and more. As authorized dealers for several top brands, we also have direct access to genuine OEM parts.
Most furnace repairs are completed in a single visit of 1 to 3 hours. Our technicians arrive stocked with the most commonly needed parts, so we can often fix the problem the same day without a return trip. Complex repairs involving the heat exchanger or blower assembly may take longer or require ordering a specific part.
A good rule of thumb is the '5,000 rule': multiply the age of the furnace (in years) by the estimated repair cost. If the result exceeds $5,000, replacement is usually the smarter investment. If your furnace is over 18 years old, requires frequent repairs, or has a cracked heat exchanger, we'll give you an honest assessment of whether repair or replacement makes more financial sense.
A brief burning smell at the start of the heating season is usually just dust burning off the heat exchanger after sitting idle all summer. This is normal and should clear within a few minutes. If the smell persists, smells like burning plastic or electrical components, or is accompanied by smoke, turn off the furnace and call us immediately as it could indicate a more serious issue.
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London's most trusted HVAC team. Same-day service, honest pricing, and a clean job every time.