Furnace Repair in Ajax

Q: Should I repair or replace my old furnace?

If the furnace is over 15 years old and the repair quote is more than half the cost of a new mid-efficiency unit, replacement usually wins on five-year math. We give you both numbers and let you choose.

Need furnace repair in Ajax today? North Wind HVAC Pro provides same-day, TSSA-approved furnace service across Ajax, 7 days a week. Call (647) 558-5528 for standard bookings or 1-877-707-1615 for after-hours emergencies. Diagnostics run $89 to $149, and most repairs land between $150 and $600. Our licensed gas technicians service Lennox, KeepRite, Goodman, Tempstar, Ruud, and Comfortmaker furnaces in homes from Ajax Downtown to Carruthers Creek. We hold a 5.0 rating across 104 reviews and arrive in marked trucks with parts on board.

Common Furnace Problems We Fix in Ajax Homes

Ajax sits next to Lake Ontario, so winter wind chill and freeze-thaw cycles push furnaces hard from November through March. The most frequent calls we get from Ajax homeowners are no-heat starts after a cold snap, short cycling that leaves bedrooms cold while the thermostat reads “satisfied,” and yellow burner flames that should be steady blue.

In the 1990s and 2000s subdivisions across Westney Heights, Applecroft, and Southwest Ajax, we see a lot of aging mid-efficiency units pushing past the 18-year mark. Common symptoms include cracked heat exchangers, failed inducer motors, dirty flame sensors, igniter failure, and pressure switch faults from blocked intake or exhaust pipes. Snow drift around side-wall vents is a recurring cause of lockout calls in Lakeside and along Carruthers Creek where homes back onto open fields. We also see clogged filters more often than you would expect, and a $20 filter swap is sometimes all that stands between you and heat.

Newer high-efficiency furnaces in the Central Ajax and Pickering Village border builds tend to throw control board codes tied to condensate drain blockages, which freeze overnight when the basement runs cool. Other common faults on these condensing units include stuck Honeywell or White-Rodgers gas valves, failed draft inducer bearings, and intermittent flame proving issues caused by a dirty flame rod. We carry common parts on the truck so most of these get fixed on the first visit, even on Sunday evenings.

Our Furnace Repair Process

Every Ajax service call follows the same steps. We start with a phone triage to confirm the symptom, furnace age, and whether you have heat at all. If you’re without heat in winter, you go to the front of the queue, ahead of routine maintenance and replacement quotes.

On site, the technician runs a full diagnostic: combustion analysis with a calibrated analyzer, gas pressure check at the manifold, flame signal reading in microamps, thermostat continuity, blower amp draw, and inspection of the heat exchanger with a borescope when warranted. You get the diagnosis in plain language, the repair quote in writing, and approval before any wrench moves. We never start work without your sign-off.

After the repair, we re-test the unit through a full heat cycle, confirm safe CO levels at the supply register, and leave the work area cleaner than we found it. All repairs come with a written warranty on parts and labour, and we email the invoice plus diagnostic report so you have a paper trail for the next tech, the next homeowner, or your insurance company.

Furnace Repair Cost in Ajax

Diagnostic visits are $89 to $149 depending on time of day and how soon you need us. That fee is waived or credited toward the repair if you book the work with us during the same visit. After-hours and statutory holiday calls sit at the higher end of the range.

Typical repair pricing for Ajax homes:

Flame sensor clean or replacement: $150 to $250
Hot surface igniter replacement: $200 to $350
Thermocouple or thermopile (older units): $150 to $275
Pressure switch replacement: $250 to $400
Inducer motor replacement: $400 to $600
Control board replacement: $450 to $600
Capacitor or limit switch: $175 to $300
Gas valve replacement: $400 to $600
Blower motor (PSC): $400 to $600
Condensate trap clean and re-prime: $150 to $250

If diagnostics turn up a cracked heat exchanger or a failed ECM blower assembly on a furnace older than 15 years, we’ll lay out the math on repair versus furnace installation so you can decide based on real numbers, not pressure. No upsells, no commission games. We give you the parts cost, the labour cost, and the realistic remaining lifespan so the choice is yours.

Emergency Furnace Repair, 7 Days a Week

When the furnace quits at 11 p.m. in February, you can’t wait until Monday. Our after-hours line, 1-877-707-1615, is staffed every night and every weekend across Ajax and the rest of Durham Region.

If you smell gas, leave the house first and call Enbridge at 1-866-763-5427, then call us. For carbon monoxide alarm activation, get everyone outside, call 911, and call us once the home is clear. We can typically be in an Ajax driveway within 60 to 90 minutes of an after-hours call, faster during off-peak hours. Trucks stock common ignition components, capacitors, pressure switches, inducer motors, and universal control boards so most no-heat calls finish the same night. If a part has to be ordered, we’ll get heat to one zone of the home as a temporary measure where possible.

Ajax Neighborhoods We Serve

We cover all of Ajax: Ajax Downtown, Central Ajax, Lakeside, Carruthers Creek, Southwest Ajax, Westney Heights, Applecroft, and the Pickering Village border area. Same-day service applies across the full city, from the older homes near the GO Station to the newest infill builds north of Taunton. See our complete service area for surrounding Durham Region coverage including Pickering, Whitby, and Oshawa.

Furnace Brands We Service in Ajax

Lennox, KeepRite, Goodman, Tempstar, Ruud, Comfortmaker, plus Carrier, Bryant, Trane, American Standard, Amana, York, and Heil. If your furnace runs on natural gas from Enbridge Gas, we can service it. We also work on propane conversions and a handful of older oil-to-gas swaps still in service in north Ajax.

Frequently Asked Questions

How fast can you get to my Ajax home?

Most same-day bookings placed before 2 p.m. get a technician on site the same afternoon. After-hours emergency calls in Ajax typically see a tech within 60 to 90 minutes. Service runs 7 days a week with no weekend surcharge for standard daytime calls. We cover Ajax from our Innisfil base with techs already routed through Durham Region most days.

Are your technicians licensed for gas work in Ontario?

Yes. Every technician on our trucks holds a current TSSA gas licence (G1, G2, or G3 depending on scope). You can verify any Ontario gas tech’s status through the TSSA gas technician registry. We also carry $5M liability insurance and WSIB clearance, and we’ll send you copies on request.

Should I repair or replace my old furnace?

The rule of thumb: if the furnace is over 15 years old and the repair quote is more than half the cost of a new mid-efficiency unit, replacement usually wins on five-year math. We’ll give you both numbers and let you choose. No pressure either way. For Ajax homes still running 60% AFUE units from the 1990s, the operating-cost savings of a new 96% AFUE furnace alone often pay back the difference in 6 to 8 years.

Why is my furnace blowing cold air?

Most common causes are a tripped high-limit switch from a clogged filter, a failed igniter, a bad flame sensor, or a pressure switch fault. Check the filter first, then call us if cold air keeps coming out of the vents. Also worth checking: thermostat set to “fan on” instead of “auto” will blow room-temperature air between heat cycles, which feels cold compared to a heating cycle.

Do you offer financing on repairs?

Financing is available on larger repairs over $500 and on full furnace replacements. We can run the application on site and have an answer in minutes. Ask the technician for current terms, including 0% promotional periods that come and go through the year.

What size furnace does an Ajax home need?

Most Ajax houses run a 60,000 to 80,000 BTU furnace, with newer well-insulated builds in Central Ajax sometimes sized down to 60,000. Larger or older drafty homes near the lake may need 90,000 to 100,000 BTU. We do a proper Manual J load calculation before quoting any replacement so you don’t end up oversized, which causes short cycling, comfort problems, and shorter equipment life.

Do you service rooftop or commercial furnaces in Ajax?

Yes, our techs handle commercial gas-fired equipment too. Call the main line and mention it’s a commercial unit so we send the right truck with proper roof-access gear and the larger gauges needed for commercial gas pressure work.

Book Your Ajax Furnace Repair Today

Call (647) 558-5528 for standard service or 1-877-707-1615 for after-hours emergencies. You can also request service online. Same-day bookings 7 days a week across Ajax. While you’re here, check out our main furnace repair page, our Toronto furnace repair service, or our AC repair work for summer cooling.