Furnace is not heating
A no-heat condition can involve the thermostat, power supply, ignition system, flame sensor, safety switch or gas controls. An on-site diagnosis is needed before recommending a repair.
Heating service
Gas Furnace Repair in Toronto & the GTA
No heat, cold air, repeated shutdowns or an ignition fault? Request an in-home furnace diagnostic visit and get a clear explanation of the recommended repair.
In-home diagnosis
Furnace problems need a precise diagnosis
A furnace can stop heating for several different reasons, and replacing a part based on the symptom alone can miss the actual fault. Appliance Trust troubleshoots the operating sequence, accessible components and safety controls before recommending repair work.
We accept residential gas furnace repair requests across Toronto, the Greater Toronto Area, York Region and parts of Simcoe County. Contact us with the furnace brand, model number and any displayed error code so our team can confirm the earliest available visit.
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Our team will contact you during service hours to confirm availability.
Or call 647 460 6409Common gas furnace problems we diagnose
Similar symptoms can have different causes. These are common starting points for inspection, not a diagnosis without seeing the equipment.
Furnace blows cold air
Cold air from the vents may point to an ignition interruption, control issue, airflow restriction or a system that is shutting the burners down early.
Short cycling
Frequent starts and stops can be related to restricted airflow, thermostat settings, overheating protection, flame sensing or equipment sizing.
Ignition or pilot problem
If the burners do not light or stay lit, the ignition components and safety sequence should be checked rather than repeatedly resetting the furnace.
Unusual furnace noise
Rattling, squealing, scraping or grinding can originate from loose panels, the blower, inducer assembly, bearings or debris inside the system.
Furnace fault code
The diagnostic light can help narrow the problem. Note the flashing pattern and provide the furnace make and model when requesting service.
What a furnace visit can include
The exact checks depend on the furnace design and reported symptoms. A typical diagnostic visit may include:
- Review the symptoms, thermostat settings and furnace fault code
- Inspect accessible ignition, flame-sensing and safety components
- Check the filter, blower operation and visible airflow restrictions
- Assess accessible venting, condensate and electrical connections
- Explain the findings and recommended work before proceeding
- Test furnace operation after an approved repair
Important safety information
Smell gas or hear a carbon monoxide alarm?
Leave the building immediately. From a safe location, call 911 or Enbridge Gas at 1-866-763-5427. Do not use electrical switches, appliances, phones, vehicles or anything that could create a spark while you are inside.
Do not return until emergency personnel say it is safe. A website booking is not an emergency reporting service.
Enbridge emergency informationMake an informed decision
Furnace repair or replacement?
A repair can make sense when the furnace is otherwise in good condition and the required component is available. Replacement may deserve consideration when the system has repeated failures, a major component has failed, parts are obsolete or operating condition and efficiency no longer justify further repairs.
We first identify the fault so you can compare the recommended repair with the condition of the full system.
Explore gas furnace installationBefore your appointment
- Photograph the furnace model and serial-number label
- Write down the thermostat setting and any fault-code pattern
- Replace only a visibly blocked filter if it is safe to access
- Clear stored items away from the furnace without opening panels
- Tell us immediately about gas odour, soot or a CO alarm
Gas furnace repair service areas
Appliance Trust serves homes across Toronto and surrounding communities. Select your area for local appliance service details, or call to confirm furnace-service availability for your address.
Gas furnace repair FAQ
Why is my gas furnace running but not producing heat?
Possible causes include thermostat or power problems, an ignition fault, a dirty or failing flame sensor, restricted airflow, a safety-limit shutdown or a gas-control issue. Because several faults produce the same symptom, the furnace should be diagnosed before parts are replaced.
Can I reset my furnace myself?
You can check the thermostat setting, the furnace power switch and whether the filter is visibly blocked. Follow only the reset instructions in the manufacturer’s manual. Do not repeatedly reset a furnace that locks out, and never open or adjust gas components yourself.
What information should I provide when booking furnace repair?
Provide your address, furnace brand and model if available, the symptoms, any fault-code pattern and when the problem began. Mention any gas smell, carbon monoxide alarm, unusual flame appearance or electrical burning smell immediately.
Do you offer gas furnace repair across Toronto and the GTA?
Appliance Trust accepts furnace service requests across Toronto and many GTA, York Region and Simcoe County communities. Appointment availability depends on location, technician scheduling and the parts required.
Should I repair or replace an older furnace?
The decision depends on the failed component, repair cost, furnace age and condition, previous breakdowns, efficiency and whether major parts remain available. A diagnosis provides the information needed to compare repair with replacement.
What should I do if I smell natural gas?
Leave the building immediately and call 911 or the Enbridge Gas emergency line at 1-866-763-5427 from a safe location. Do not operate switches, phones, appliances, vehicles or anything that could create a spark while inside.
Request a service visit
Need help with your gas furnace?
Send the symptoms, furnace brand, model and your address. Our team will contact you during service hours to confirm availability.