132 Cartwright Ave, North York ON
Mon–Sat 8am–7pm · Sun 9am–5pm
Furnace repair & replacement
Furnace repair & replacement
across Toronto & the GTA
A furnace usually gives you warning before it stops. Short cycling, a lazy flame, a new noise on start-up — we would rather see it then than at midnight in February.
TSSA-licensed gas technicians
Same-week repair slots when available
Written quotes before major work
Serving Toronto & the full GTA
Heating priorities
Heat exchanger and venting inspected, not just the error code
AFUE options matched to your ducts, not the brochure maximum
Priority scheduling on winter no-heat calls
Written repair-versus-replace numbers before you decide
1,000+
Clients served
TSSA
Certified team
7 days
A week support
GTA-wide
Service coverage
20+ yrs
Climate experience
Furnace specialists
Reliable heat when Toronto winters demand it
Most no-heat calls we attend in January were avoidable in October. A cracked heat exchanger, a tired inducer motor or a pressure switch on its way out will all show themselves during a service, and none of them announce anything on a mild day.
When something has already failed, the diagnosis matters more than the part. An error code tells you what tripped, not why — so we check the venting, the flame pattern and the electrical side before quoting, because replacing the obvious component on a furnace that keeps failing for another reason helps nobody.
On replacement, you get both numbers in writing: what the repair costs, what a new unit costs, and which one we would choose in your position. Sometimes that means talking you out of the bigger job.
What matters most for furnace repair and replacement in the GTA
Right sizing, licensed gas/refrigeration work, and commissioning beat the cheapest sticker price. We verify airflow, safety devices, condensate paths, and controls so your system does not fail the first extreme week of the season. Ask us about dual-fuel, zoning, and rebate-eligible models during your quote.
High-efficiency furnace incentives
Replacing an aging mid-efficiency furnace with a qualifying high-AFUE model may unlock provincial or utility incentives. See current programs on our HVAC rebates & incentives page — eligibility changes, so we verify details with your quote.
Signs you need furnace service
- No heat or intermittent ignition on cold mornings
- Unusual banging, whistling, or rattling at startup
- Yellow or flickering burner flame (should be steady blue)
- Rooms that never catch up while others overheat
- Spike in gas bills without a weather explanation
- Furnace older than 15–20 years with frequent callbacks
- Visible rust, water near the unit, or carbon monoxide detector alerts
- Thermostat calls for heat but the blower never runs
Furnace project flow
How furnace repair and replacement works
From cold-morning no-heat calls to high-efficiency replacements sized for Toronto design temperatures.
Symptom intake
No heat, noise, codes
Combustion check
Safety & ignition path
Airflow review
Filter, blower, ducts
Repair vs replace
Written cost options
Install & venting
Code-ready gas work
Commission
AFUE settings & walkthrough
Furnace or heat pump?
Furnace vs. heat pump: which fits your home?
Both can heat a Toronto home well. Here is how they compare on the factors that matter most.
| Gas furnace | Heat pump | |
|---|---|---|
| Upfront cost | Lower for like-for-like replacement | Higher, offset by rebates |
| Cold-weather output | Consistent regardless of outdoor temp | Strong with cold-climate models + backup |
| Cooling | None — needs separate AC | Built in, one system for both seasons |
| Running cost | Tied to gas prices | Tied to electricity, often lower overall |
| Best fit | Existing gas ductwork, lowest upfront cost | Electrification goals, year-round comfort |
What we offer
Furnace services for Toronto homes & businesses
From emergency no-heat calls to planned high-efficiency upgrades, every visit includes a licensed tech and a clear scope of work.
Diagnostic & repair
Ignition, flame sensing, inducer motors, pressure switches, gas valves, control boards, and blower assemblies — repaired with OEM-quality parts when possible.
Furnace replacement
Right-sized high-efficiency gas furnaces with proper venting, condensate management, and thermostat pairing for GTA climate loads.
Tune-ups & maintenance
Seasonal clean-and-check: burners, heat exchanger inspection, filter guidance, amp draws, and safety switch verification before peak winter.
Duct & airflow fixes
Address restricted returns, unbalanced supplies, and filter cabinets that starve the blower — often the real cause of “weak heat.”
Explore heating options →Thermostat upgrades
Compatible smart and programmable controls that work with your furnace staging — no guesswork adapters.
Commercial light furnaces
Rooftop and mechanical-room gas furnaces for shops, offices, and mixed-use spaces with documented service reports.
Request a commercial quote →
Before the cold snap
Most January no-heat calls were visible in October
A seasonal service checks the parts that only fail under load — the ones an error code will not warn you about.
Book a furnace serviceWhy Toronto Air Systems
Why choose Toronto Air Systems for furnace work
Local crews, licensed workmanship, and recommendations built around how Toronto buildings actually heat and cool — not generic scripts.
TSSA-licensed technicians
Every technician who works on your equipment holds current Ontario gas and/or refrigeration credentials — no uncertified subcontractors.
Built for Toronto winters & summers
We size and install equipment for real GTA climate extremes, not brochure averages from milder markets.
Transparent pricing
Detailed written quotes with equipment specs, labour, and warranty terms. No bait-and-switch or surprise change orders.
Multi-brand expertise
We service and install major HVAC brands, so recommendations fit your home — not a single manufacturer quota.
How it works
From first call to warm rooms
From first call to commissioned equipment, you always know the next step, the timeline, and what is included.
01
Consultation
Tell us about your home or building, symptoms, and goals — by phone or online form.
02
On-site assessment
A licensed technician evaluates your existing furnace, ductwork, and load requirements.
03
Written quote
You receive clear options, pricing, timelines, and rebate notes — no vague estimates.
04
Installation or repair
Our TSSA-licensed team completes the work to code with minimal disruption.
05
Follow-up support
We walk you through operation, warranty, and ongoing maintenance recommendations.
Brands we work with
Furnace brands we service & install
We are not locked to one manufacturer. We match equipment to your ductwork, venting, and budget.
Where we work
Furnace service across Toronto & the GTA
Dispatched from North York with coverage across the city and surrounding municipalities.
Toronto
All neighbourhoods & districts
North York
Our home base
Mississauga
West GTA residential & commercial
Brampton
Full HVAC coverage
Vaughan
Including Woodbridge & Concord
Markham
East GTA homes & businesses
Richmond Hill
Residential & mixed-use
Scarborough
East Toronto
Etobicoke
West Toronto
Oakville
Halton Region
Pickering & Ajax
Durham Region
Whitby & Oshawa
East GTA
Client reviews
What clients say about our furnace work
Our furnace died on a −18° night in Willowdale. Toronto Air Systems diagnosed a failed inducer, replaced it the same day, and left the mechanical room cleaner than they found it.
North York homeowner
They walked us through repair versus a 96% AFUE replacement with real numbers — not a hard sell. We replaced, and our January gas bill dropped noticeably.
Mississauga
Professional, TSSA stickers on the invoice, and they fixed a short-cycling issue our previous contractor missed for two seasons.
Vaughan
FAQ
Furnace repair FAQ — Toronto & GTA
How much does furnace repair cost in Toronto?
Most diagnostic visits lead to a written repair range once the fault is confirmed. Simple parts (igniters, capacitors, flame sensors) are typically lower; gas valves, heat exchangers, and control boards cost more. We quote before authorizing major parts so there are no surprises.
When should I replace my furnace instead of repairing it?
Consider replacement if the unit is 15–20+ years old, the heat exchanger is cracked, repair costs approach half the value of a new high-efficiency system, or parts are discontinued. We give a side-by-side so you can decide with numbers.
Do you offer emergency furnace repair in winter?
Yes — no-heat calls are prioritized during cold snaps across Toronto and the GTA. Call 647 953-4252 and we will schedule the earliest licensed technician available.
What AFUE rating should I choose for a GTA home?
Most Toronto replacements land in the mid-to-high 90% AFUE range. The right choice depends on your envelope, duct losses, and utility rates — we size for comfort first, efficiency second, not brochure maximums alone.
Can you service my furnace brand?
We install and service York, Trane, Goodman, Daikin, TCL, Mitsubishi Electric, and Moovair, and we repair most other major residential brands you may already have. Bring the model number if you have it — it speeds parts sourcing.
Is a cracked heat exchanger dangerous?
Yes. Cracks can allow combustion by-products into the airstream. If we find exchanger damage, we shut the unit down and document safe next steps. Do not bypass safety switches. If your model is covered by a manufacturer notice, see product safety & recalls.
Do high-efficiency furnaces qualify for rebates?
Often yes, when models and installation meet program rules. Check our rebates page and we will note likely incentives on your quote.
How much does furnace repair and replacement cost in Toronto?
Cost depends on equipment capacity, brand, duct or piping complexity, electrical/gas upgrades, and whether you repair or replace. We provide written quotes after a site assessment so you can compare options fairly. Call 647 953-4252 for a visit.
Do you serve my area in the GTA?
Yes. We are based in North York at 132 Cartwright Ave and regularly serve Toronto, Mississauga, Vaughan, Markham, Scarborough, Etobicoke, Brampton, and nearby communities.
Are your technicians licensed?
Yes. Gas and refrigeration work is performed by TSSA-licensed technicians. We follow Ontario code practice for venting, refrigerant handling, electrical disconnects, and condensate management.
Ready for reliable furnace heat?
Book a licensed assessment from our North York team — repair or replace, with clear pricing.