Best Furnace Repair Services in Ajax, ON
Northfield Mechanical repairs gas furnaces across Ajax seven days a week from 8:00 am to 8:00 pm, as part of our Durham Region run.
TSSA certified technicians diagnose the fault, quote the repair before starting, and the diagnostic is free when it leads to a repair.
Call 416 417 1799 or book an appointment .
Booking From the Durham End of the Service Area
Ajax sits at the eastern end of our run, alongside Whitby and Oshawa .
We cover it properly rather than treating it as an afterthought, but booking earlier in the day gives you the best chance of a same day slot here, because the vans work their way east.
Call in the morning during a cold snap and the office will tell you straight away what is realistic rather than promising a window we cannot hold.
Planning Your Furnace Repair Visit
Service Area:
Ajax and surrounding
Durham Region communities
Service Hours:
Seven days a week
8:00 am to 8:00 pm
Best Booking Tip:
Contact us earlier in the day
for the best chance of
same day availability.
What Goes Wrong With Furnaces in Ajax
Much of Ajax is subdivision housing built from the 1980s onward, with newer development north of Taunton Road. This means many homes have high efficiency condensing furnaces with their own common fault patterns.
Blocked Condensate Traps
Blocked condensate traps and drains are common problems in high efficiency condensing furnaces and often trigger pressure switch errors.
Pressure Switch Errors
Pressure switch faults can interrupt furnace operation and may indicate a blocked condensate system.
Iced Vent Terminations
Intake and exhaust vents can ice over after freezing rain, creating faults similar to condensate drainage problems.
Dirty Flame Sensors
A furnace that lights and then shuts down after a few seconds may have a dirty flame sensor.
Ignition and Control Problems
Failed igniters and control boards can prevent the furnace from operating reliably.
Inducer Motor Problems
A worn inducer motor can affect furnace operation and may make unusual noises before failing.
Conventional Furnace Wear
Older properties closer to the lake may have conventional furnaces with age-related component failures.
Filters Cause More Calls Than Any Single Part
A blocked furnace filter is one of the simplest problems to prevent, but it can cause a working furnace to shut itself down.
Restricted Airflow
A blocked filter restricts airflow through the furnace, causing the heat exchanger to overheat.
Safety Limit Shutdowns
When the furnace overheats, a limit switch may shut it down. To a homeowner, this can look exactly like a broken furnace.
Regular Filter Changes
Check standard one inch filters monthly during heating season and replace them every one to three months, depending on conditions.
Heat Exchangers and Carbon Monoxide
Any furnace inspection we do includes the heat exchanger, because a crack in it is the one fault that is not a cost question.
A cracked heat exchanger can allow combustion products into the air you breathe, so the furnace is shut down until the exchanger or the unit is replaced.
On a newer furnace, the heat exchanger itself is often covered by the manufacturer warranty. On an older one, replacing the furnace is usually the answer.
Carbon monoxide alarms are essential. Ontario requires carbon monoxide alarms in homes with fuel-burning appliances. Check your alarms regularly and replace them according to their manufacturer's expiration date, which is often around ten years.
If a carbon monoxide alarm sounds, leave the building immediately and contact emergency services from outside.
Pricing and Warranty
The diagnostic is free when it leads to a repair with us.
The repair price is agreed before the work starts.
Our technicians explain the fault and proposed repair so you know what to expect.
Repair and Installation Coverage
Repair Warranty:
Repairs are covered
for two years.
Installation Parts Warranty:
Installations carry a
10 year warranty on
manufacturer parts.
Qualified Technicians:
Work is carried out by
TSSA certified technicians.
Book Furnace Repair in Ajax
Call 416 417 1799 or book an appointment online for professional furnace repair services across Ajax.
We also serve Whitby and Oshawa . See our full services page , or explore air conditioning work in Ajax for summer cooling needs.
