Furnace won't start
No response from the thermostat or system.
Heating / Furnace Repair
Professional Furnace RepairPrompt diagnostics and dependable repairs from experienced technicians — so your home is warm again, properly.
— Common Furnace Problems
Symptoms we diagnose every day.
If something feels off with your furnace, it usually is. These are the most common issues we're called out to across Toronto and the GTA.
No heat
System runs but the home isn't warming up.
Cold air from vents
Blower running without proper heat output.
Strange noises
Banging, rattling, whistling or grinding sounds.
Burning smells
Unusual odours coming from the furnace or vents.
Short cycling
Furnace turns on and off in rapid succession.
Weak airflow
Reduced air movement or uneven room temperatures.
Constant running
Furnace never seems to satisfy the thermostat.
Thermostat problems
Blank screens, wrong readings or lost programming.
Ignition issues
Failed starts, pilot problems or repeat lockouts.
— Our Diagnostic Process
Diagnosed properly, before it's repaired.
Good repair work begins with an honest diagnosis. Every service call follows the same steady process, whether the issue is straightforward or complex.
- 01
Inspection
A full visual review of the furnace, venting and connected controls.
- 02
Testing
Measurements and functional tests to isolate the true source of the issue.
- 03
Diagnosis
A clear, plain-language explanation of what's happening and why.
- 04
Repair options
Sensible options presented honestly — including doing nothing when appropriate.
- 05
Transparent pricing
Written pricing before any work begins. No surprises on the invoice.
- 06
Testing after repair
Full verification that the system runs safely and correctly before we leave.
— Why Homeowners Choose Proper HVAC
Repair work you can trust.
Experienced technicians
Trained on the equipment in your home and the problems it tends to develop.
Clear communication
Straightforward explanations before, during and after the visit.
Quality workmanship
Repairs completed properly the first time and verified before we leave.
Respect for your home
Boot covers, drop cloths and tidy work areas — always.
Repair-first philosophy
We fix what can be fixed, and only recommend replacement when it's genuinely the better choice.
Honest recommendations
The work your furnace actually needs — nothing added, nothing exaggerated.
— Repair vs Replacement
Fix it, or replace it?
Most furnaces should be repaired, not replaced. But eventually every system reaches the point where a new furnace is the better long-term investment. Here's how we think about it.
— Repair usually makes sense when
A repair keeps a good system running.
- The furnace is under 10–12 years old
- The repair is minor or moderate in cost
- The system has been reliable overall
- Efficiency and comfort are still acceptable
— Replacement may be the better investment when
A new system delivers real long-term value.
- The furnace is 15+ years old
- Repair cost approaches a significant share of replacement
- Breakdowns are becoming frequent
- Efficiency, comfort or safety concerns keep returning
— When Heat Can't Wait
Urgent no-heat calls.
A furnace failure in a Toronto winter is more than an inconvenience — it's a call we take seriously. If your home is without heat, contact us directly by phone for the fastest response and we'll get a technician to you as soon as we can.
For non-urgent repairs, booking online is the easiest way to schedule a visit at a time that suits you.
— FAQ
Frequently asked questions.
What Toronto homeowners ask us most often when a furnace isn't behaving.
Still not sure? Contact us and we'll help you decide the right next step.
Cold air usually points to an ignition problem, a flame sensor issue, a tripped safety switch or a thermostat set incorrectly. A technician can identify the exact cause quickly and confirm whether it's a small fix or something more involved.
Common causes include a tripped breaker, a shut-off switch that's been bumped, a failed ignitor or control board, or a thermostat that has lost power. If checking the breaker and thermostat doesn't restore heat, it's time to book a service call.
Repair costs vary widely depending on the part involved and the age of the system. We provide clear, written pricing after diagnosis — before any work begins — so you can make an informed decision without pressure.
Many common furnace repairs are completed in a single visit once the issue is diagnosed. More involved repairs, or those requiring a specific replacement part, may take longer — and we'll always tell you what to expect up front.
It depends on the age of the equipment, the nature of the repair and its overall reliability. Most furnaces are worth repairing. Systems in the 15+ year range with a significant repair on the horizon are often better replaced — we'll walk you through the numbers honestly.
Yes. Our technicians regularly service older equipment across Toronto and the GTA. Where a repair is safe, sensible and cost-effective, we'll do it. Where it isn't, we'll say so clearly.
We service most major residential furnace brands installed across Toronto and the GTA. If you have a specific make and model in mind, mention it when booking so we can confirm before dispatch.
If your furnace is making a loud banging, grinding or metal-on-metal sound — or you smell burning or gas — shut it off at the thermostat and contact us. Continuing to run a furnace in that state can turn a small repair into a much larger one.
Annual maintenance won't eliminate every possible failure, but it dramatically reduces preventable ones. Most no-heat calls we respond to trace back to something a seasonal tune-up would have caught. ProperCare is our recommended maintenance program.
Proper HVAC provides furnace repair for homeowners throughout Toronto and the Greater Toronto Area, including Etobicoke, North York, Scarborough, York, Vaughan, Richmond Hill, Markham, Mississauga, Oakville and Brampton.
— Get Started
Need Furnace Repair?
Book a visit online, ask about financing for a larger repair or replacement, or join ProperCare for ongoing peace of mind.
Or call 416-580-HEAT (4328)