Furnace Repair Toronto: Same-Day, TSSA-Licensed Service
Furnace repair in Toronto covers the M4, M5, and M6 postal zones, where Victorian and Edwardian masonry homes, postwar bungalows, and infill builds sit on a housing stock with an older-than-average furnace age. Best Furnace Repair Toronto dispatches TSSA G1 and G2 licensed technicians the same day, with cold-snap no-heat calls prioritised inside a 4-hour window across Old Toronto, Leaside, The Beaches, High Park, The Annex, Riverdale, and Cabbagetown. Diagnostic starts at $99 CAD and is waived when you authorise the repair on the same visit.
Toronto Coverage
- Same-day, 4-hour cold-snap window
- Postal zones: M4, M5, M6
- Old Toronto, Leaside, The Beaches, High Park
- TSSA G1 and G2 licensed technicians only
What Actually Stops Homeowners From Calling a Furnace Technician
Four hesitations we hear on first calls, and the straight answers behind each one.
“The diagnostic fee feels like a trap.”
Some contractors charge $200 CAD to show up and discount nothing off the repair. Our diagnostic starts at $99 CAD and is waived when you authorise the repair on the same visit. The fee covers a full combustion analysis, CO check, and a written fault report you keep regardless.
“You cannot tell if the technician is really licensed.”
Ontario requires TSSA G1 or G2 certification for any gas furnace work. Ours hold both. Certificate numbers appear on every invoice per B149 fuel code. You can verify any number on the TSSA public registry before the technician starts.
“Nobody will publish the price.”
Our four CAD scope bands are published on this page: diagnostic $99 to $149, standard repair $150 to $950, major repair $600 to $1,500, full replacement $3,500 to $8,500. Scope named, not hidden behind adjectives.
“The furnace is 15 years old, is it worth repairing?”
At 15 years with an intact heat exchanger, 5 to 10 more service years. At 20+, the 95% AFUE efficiency gap justifies replacement. Written repair-vs-replace recommendation on every diagnostic, with the numbers.
Furnace and Heating Services in Toronto
Every service below is available across Old Toronto, Leaside, The Beaches and the wider Toronto area, handled by TSSA G1 and G2 licensed technicians.
24/7 Dispatch Emergency Furnace Repair Toronto
24/7 same-day dispatch for cold-snap no-heat calls, prioritised within 4 hours across the GTA. After-hours diagnostic runs $199 to $299 CAD, waived when you authorise the repair on the same visit. Every repair meets Ontario B149 fuel code.
Most Common Gas Furnace Repair and Diagnostic Toronto
Diagnostic from $99 CAD, waived on same-visit repair. Thermocouple, flame sensor, capacitor, gas valve, ignition module. Standard part repairs run $150 to $950 CAD, major control board and gas valve replacements up to $1,500 CAD. Every quote itemises diagnostic, parts, labour, and disposal separately.
Rebates Filed Furnace Replacement Toronto
80% AFUE from $3,500 CAD, 95% AFUE from $5,500 CAD. Removal, disposal, and permit included, rebate paperwork filed for you. We replace the furnace end to end: removal, disposal, venting, permit, and commissioning with a combustion analysis.
Radiant Specialists Boiler Repair and Radiant Heating Toronto
Cast-iron and condensing combi-boiler repair, circulator and expansion tank service, and hydronic radiator balancing across Toronto and Vaughan, from $500 CAD. Diagnostic $99 to $149 CAD. Most repairs $500 to $3,500 CAD (circulator, expansion tank, aquastat, pressure valve, zone controls). Full combi-boiler or cast-iron system replacement $6,500 to $12,500 CAD. We service 70,000 to 200,000 BTU boilers up to 10 zones on Viessmann, Navien, and Weil-McLain systems with Taco and Grundfos circulators.
Furnace Installation Toronto
Furnace installation in Toronto by TSSA G1/G2 licensed technicians: Manual J sizing, code venting, permit, and commissioning, $3,500 to $8,500 CAD installed. Manual J heat-loss calculation to size 40,000 to 120,000 BTU output correctly, vented to Ontario Building Code with System 636 polypropylene, and commissioned with a combustion analysis. Installation completes in 1 to 2 days depending on venting and gas line scope.
High-Efficiency Furnace Conversion Toronto
95% AFUE conversions with rebate coordination, condensing venting, and 15 to 20 percent gas savings. We handle the condensing venting upgrade and file Enbridge Home Efficiency Rebate Plus and Canada Greener Homes Grant paperwork on your behalf.
Furnace Tune-Up Toronto
TSSA-licensed 12-point furnace tune-up across Toronto and the GTA, with combustion analysis, CO reading, thermostat calibration, and a written record, $149 to $249 CAD. A yearly tune-up before the first cold snap keeps the system safe and efficient and preserves warranty and insurance coverage.
Annual Furnace Maintenance Toronto
TSSA-licensed annual furnace maintenance across Toronto and the GTA, with combustion and CO checks and documented records for insurance, warranty, and RentSafeTO. Annual maintenance $149 to $249 CAD with 12-point inspection, CO monitor reading, and documented records for insurance, warranty, and RentSafeTO landlord certification. Book before October to lock in a slot ahead of the cold-snap dispatch queue.
Commonly needed in Toronto: Boiler Repair and Radiant Heating Toronto , High-Efficiency Furnace Conversion Toronto
How Our Toronto Furnace Diagnostic Process Works
Every furnace call follows the same documented process, from booking through post-repair combustion verification.
Booking and Dispatch
Send your postal code, furnace age, and symptom. Same-day or next-morning slot booked. Diagnostic fee quoted upfront in CAD.
On-Site Inspection
Full furnace assessment: heat exchanger, ignition system, blower motor, flame sensor, gas valve, combustion analysis with CO monitor, flue draft, and thermostat response.
Written Diagnostic with Options
You receive a written report with the fault identified, parts required, CAD labour and parts cost, and either a repair or replacement recommendation.
Repair or Replacement Scheduled
Repair authorised same-visit gets the diagnostic fee waived. Replacement scheduled within 3 to 5 business days, or 24 hours for an emergency no-heat situation.
Post-Service Verification and Warranty
Combustion analysis re-run, CO reading verified, thermostat cycle tested, and the parts and labour warranty issued in writing.
No heat in Toronto?
Same-day, 4-hour cold-snap window. Call and we will tell you the likely fault and the CAD range before a technician is dispatched.
Why Choose Best Furnace Repair Toronto?
20+ Years of Furnace Repair Experience across the Toronto core and the wider GTA
Same-day dispatch with cold-snap no-heat calls prioritised inside a 4-hour window
TSSA G1 and G2 licensed technicians only, certificate numbers on every invoice, work to Ontario B149 fuel code
Heritage and narrow-clearance mechanical room experience in The Annex, Cabbagetown, and Riverdale
Cast-iron radiator and hydronic boiler service for older Old Toronto homes
Four published CAD scope bands, diagnostic waived on same-visit repair
How Fast Is Furnace Repair Across the Toronto Core?
Best Furnace Repair Toronto routes crews off the Gardiner, the DVP, and the Allen, with surface routing down Bloor, Dundas, and Queen when the expressways seize up during a cold-snap evening. On a no-heat call in M4, M5, or M6 we target a 4-hour arrival window, and in practice the shortest waits are mid-morning and early afternoon, before the 3 p.m. eastbound crawl.
Downtown and midtown parking is the real constraint, not distance. Our technicians carry permits for metered streets and coordinate laneway or garage access before arrival, so the visit starts with diagnostics instead of a circling van. In Cabbagetown, The Annex, and Riverdale, where driveways are rare and laneways are narrow, we confirm the access route when you book. Calls near Toronto General Hospital and the Casa Loma hill get the same routing check.
Common Toronto parts are carried on the van: hot surface ignitors, flame sensors, run capacitors, pressure switches, limit switches, and thermocouples for older pilot systems. That is what lets a standard fault finish in 60 to 120 minutes on the first visit rather than turning into a parts-order return trip.
Furnace Problems in Victorian, Bungalow and Infill Homes
Old Toronto is a mix of Victorian and Edwardian semis with cast-iron radiators and hydronic loops, postwar bungalows in the east end, and newer infill builds with high-efficiency condensing units. Each one fails differently. Radiator homes bring circulator pump, expansion tank, and aquastat faults. Converted homes bring undersized returns and short-cycling from a furnace that was never right-sized for the envelope. We service Lennox, Carrier, Trane, Goodman, Napoleon, York, Rheem, and Bryant equipment.
Heritage properties in The Annex and Cabbagetown often have narrow-clearance mechanical rooms, so a replacement has to be sized on physical clearance and venting path, not just BTU. We measure the route before quoting a 95% AFUE condensing unit, because the System 636 venting run is what decides whether the conversion is a one-day job or a two-day job.
Leaside, The Beaches, and High Park homes commonly still run mid-efficiency 80% AFUE units installed in the late 1990s and 2000s. At 20+ years those are the strongest candidates for a high-efficiency conversion, and we file the Enbridge Home Efficiency Rebate Plus and Canada Greener Homes Grant paperwork on your behalf.
What Toronto Customers Say
“No heat at 6 a.m. in a 1920s semi. A licensed tech was here before noon, found a cracked hot surface ignitor, and the furnace ignition repair came in at the quoted $340 CAD with the diagnostic waived.”
“Our 21-year-old mid-efficiency furnace was done. The replacement quote laid out 80% and 95% AFUE side by side with real numbers, and the high-efficiency install finished in a day with the rebate forms filed for us.”
“Cast-iron radiators and a boiler that kept losing pressure. They traced it to the expansion tank, rebalanced the hydronic loops, and explained every step without a single upsell attempt.”
Neighbourhoods and Postal Zones We Cover in Toronto
Furnace Repair in Toronto, Questions Answered
How fast can a furnace repair technician reach me in Toronto?
Which Toronto neighbourhoods do you cover?
How much does furnace repair cost in Toronto?
Can you repair a furnace in a heritage Toronto home with a tight mechanical room?
Do you service cast-iron radiators and boilers in older homes here?
Should I repair or replace an 18-year-old furnace in Toronto?
Are your Toronto furnace technicians TSSA licensed?
Still have a question about your furnace?
Tell us the symptom, the furnace age, and your postal code. We will tell you what it likely is and what the CAD range looks like before anyone is dispatched.
Book a Furnace Technician in Toronto
Same-day, 4-hour cold-snap window across M4, M5, M6. You get the fault in writing, the CAD cost up front, and the diagnostic fee waived when the repair is authorised on the same visit.
- Diagnostic waived on same-visit repair
- TSSA G1 and G2 licensed technicians
- Published CAD pricing, no quote gating