Ajax’s rapid growth since the 1980s means thousands of homes here are running furnaces that are 20-plus years old, equipment that’s either overdue for replacement or getting misdiagnosed as dead when a repair would do. David covers all of Ajax and the surrounding Durham Region communities, with same-day and emergency availability seven days a week.
From a no-heat call in January to a planned high-efficiency upgrade, David handles it all directly, no subcontractors, no call centres.
David sizes every new furnace to the actual heat loss of your home, not just the capacity of whatever came out. Ajax’s mix of 1980s subdivisions and newer builds near Westney Heights means duct layouts vary significantly, and a proper Manual J load calculation matters before any equipment goes in.
David diagnoses the actual fault, tells you what it’ll cost to fix it, and lets you decide. If the repair makes sense, he does it that visit. He stocks common parts, igniters, pressure switches, limit switches, gas valves, so most repairs wrap up the same day.
A lot of Ajax homes built in the late 1980s and 1990s are still running their original furnaces. When the repair cost starts approaching what a new unit would run, David lays out both numbers and lets you choose. He won’t push replacement on a furnace that’s got years left.
David checks heat exchangers, cleans burners, tests the ignition sequence, measures combustion, and verifies the flue. Fall is the right time to book, he catches problems before they become no-heat calls in February. A well-maintained furnace runs more efficiently and lasts longer, full stop.
Upgrading from an 80% AFUE to a 96% unit cuts your gas consumption on heating by roughly 20%. David handles the condensate drain and new PVC venting that a high-efficiency unit requires, skipping that step is the most common install mistake he sees when correcting other contractors’ work.
When the furnace stops on a January night, David picks up the phone, you won’t reach voicemail or a dispatcher. He covers Ajax and all of Durham Region for emergency calls. He’ll give you an honest arrival window and the repair price before he touches anything.
Since 2011, David has worked on furnaces across Ajax’s established neighbourhoods, from the original post-war homes near the waterfront to the tract housing along Kingston Road and the newer builds north of Taunton. He’s seen what local contractors do well and what they skip, and he runs his jobs the way he’d want his own house done.
Every call goes directly to David. He gives you the quote, he does the work, and he’s the one who follows up if anything’s not right. That’s the whole operation.
A gas furnace in Ontario typically lasts between 18 and 25 years if it gets annual maintenance. The lower end of that range is where most neglected units land, skipped tune-ups, dirty filters running month after month, and heat exchangers that develop cracks because nobody checked them. A well-maintained furnace on the upper end of that range isn’t rare. David’s seen 28-year-old Lennox units still running clean because the homeowner serviced them every fall.
What shortens lifespan most is oversizing. A furnace that’s too large for the home short-cycles, it fires, heats quickly, shuts off, then fires again before the components fully cool. That constant thermal stress wears out heat exchangers, inducer motors, and ignitors years ahead of schedule. Oversizing is a common error when contractors replace without doing the load calculation.
Ontario’s climate adds its own demands. Durham Region winters push furnaces hard from November through March, and the freeze-thaw cycles in spring affect outdoor exhaust terminations. Condensate lines in high-efficiency units can freeze during cold snaps if they’re not pitched and insulated correctly. David checks both during maintenance visits.
A furnace repair in Ajax typically runs between $180 and $650 depending on what’s failed. An igniter replacement or a pressure switch sits at the lower end. A gas valve or a draft inducer motor pushes toward the higher end. Heat exchanger failures are the exception, if the exchanger is cracked, the repair cost often exceeds the value of replacing the unit entirely, and David will tell you that directly.
New furnace installation in Ajax ranges from roughly $3,200 to $5,800 fully installed, including the new unit, labour, permits where required, and proper venting. The spread reflects the difference between a mid-efficiency 80% AFUE natural-draft unit and a top-tier 96–98% AFUE two-stage variable-speed unit. Most Ajax homeowners replacing an aging furnace land in the $3,800–$4,800 range for a quality high-efficiency install. Annual maintenance tune-ups run $140–$180.
Every job gets a free upfront quote. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
Ajax grew rapidly from the 1970s through the early 2000s, which means a large portion of the housing stock falls into three clear eras. Homes built in the late 1970s and 1980s, particularly in south Ajax near Kingston Road and the lakefront, often have original single-speed furnaces with atmospheric venting through masonry chimneys. Those chimneys need to be properly lined or decommissioned when a high-efficiency unit goes in, and skipping that step causes dangerous backdrafting.
The 1990s subdivisions north of Bayly and through the Pickering Village corridor tend to have first or second-generation mid-efficiency units. Many of those original furnaces are still running and need replacement rather than further repair. The duct systems in these homes are generally well-sized, which makes upgrading to a two-stage or modulating unit straightforward without major modifications.
Ajax’s newer builds north of Taunton Road and along the Audley Road corridor often have high-efficiency furnaces already, but David sees a recurring problem in these homes: builders spec’d furnaces sized for the shell of the house without accounting for the open-concept layouts and high-volume great rooms that are common in Ajax’s newer construction. An undersized furnace in those homes runs almost constantly in January and never quite keeps up. If your newer Ajax home has cold rooms or a furnace that runs non-stop, that’s worth investigating before blaming the equipment.
The most obvious sign is short-cycling, the furnace fires, runs for a few minutes, shuts off, and repeats. That usually points to an overheating condition caused by a dirty filter, a blocked vent, or a failing limit switch. Left alone, it stresses the heat exchanger. A cracked heat exchanger lets combustion gases into your living space, which is the scenario you want to catch early.
Yellow or flickering pilot flames on older units, or a yellow flame through the sight glass on newer ones, signal incomplete combustion. The burners may need cleaning, or there’s a gas pressure issue. Either way, it’s not something to watch and wait on. In Durham Region winters, a furnace that’s running poorly in October is a furnace that stops completely in January, David sees that pattern regularly in Ajax service calls.
Unusual smells, not the brief dusty smell at the start of heating season, but a persistent burning smell or anything resembling rotten eggs, require an immediate call. Rotten egg odour means natural gas, and that’s a Enbridge Gas emergency line call first, then David once the gas is shut off and the home is cleared. Banging or booming on startup typically points to delayed ignition, where gas accumulates before the igniter fires, that’s a repair that shouldn’t wait.
Durham Region’s heating season runs roughly from mid-October through mid-April, with the coldest sustained periods in January and February when overnight lows regularly hit -15°C or colder. At those temperatures, your furnace runs long cycles. That makes the fall tune-up critical, David cleans the burner assembly, tests combustion, and verifies the heat exchanger while there’s still time to order parts before the real cold arrives.
Filter changes are the single highest-impact maintenance action a homeowner controls. A 1-inch filter in most Ajax homes should change every 60–90 days during heating season. Thicker 4-inch media filters last longer but still need checking. A clogged filter cuts airflow, raises supply air temperatures, trips the high-limit switch, and eventually causes the furnace to shut down on a safety error, then you’re calling for emergency service on a Saturday night in January for a problem that cost three dollars to prevent.
If your Ajax home has a high-efficiency furnace, the condensate drain and the outdoor PVC vent pipes need attention before winter. The condensate drain line should flow freely and the trap should be primed with water. The outdoor pipes should terminate at least 18 inches above grade to clear expected snowpack, if they’re close to the ground, a good snowfall can block them and put the furnace into a safety lockout. That’s one of the most common January service calls David runs across Durham Region.
In Ontario, gas furnace work must be performed by a TSSA-licensed gas technician. That licence is how the province verifies that the person touching your gas appliance knows what they’re doing and carries the right insurance. David’s TSSA licence is #000398183, it’s on the public registry and you can verify it yourself. If a contractor can’t give you a TSSA licence number, don’t let them touch your furnace.
Carbon monoxide is the furnace safety issue that gets the most people hurt, and it’s almost always preventable. A cracked heat exchanger, a blocked flue, or a poorly combusting burner can all produce elevated CO. Every home with a gas appliance should have a CO detector installed within 5 metres of each sleeping area, that’s been Ontario law since 2001. David tests for CO as part of every maintenance visit and will tell you directly if he finds a condition that produces it.
On the efficiency side, the Canada Greener Homes Grant program has offered rebates for upgrading to high-efficiency equipment, and Enbridge Gas runs periodic incentive programs for qualifying furnace replacements. Availability and amounts change, so David recommends checking current program status before booking an upgrade, he can advise on what equipment qualifies when you call for a quote.
Checking the simple things before calling saves time for everyone, and sometimes it’s all it takes.
Make sure it’s set to Heat, the temperature is above room temperature, and the batteries are fresh. This resolves more calls than you’d expect.
Your furnace has a dedicated circuit breaker in your electrical panel and usually a wall switch nearby. Check both are on.
A clogged filter restricts airflow and can trigger a safety shutoff. If you can’t see light through it, replace it before calling.
High-efficiency furnaces have plastic pipes exiting near the foundation. Snow or ice blocking these causes an automatic shutoff, clear them and restart.
Many furnaces have a safety switch that cuts power if the access panel isn’t fully closed. Make sure it’s secured properly.
If none of the above fixed it, it needs a TSSA-licensed technician. David covers all of Ajax and Durham Region and picks up the phone himself.
Once a year, every year, ideally in late September or October before the heating season hits. Ontario’s winters are hard on heating equipment. A furnace running six or seven months a year accumulates combustion deposits on the burners, collects dust on the heat exchanger, and puts wear on the ignition system. An annual tune-up catches those issues before they become failures. The tune-up also checks your heat exchanger for cracks, which is the safety check most homeowners don’t think about until it’s too late. If you haven’t had your Ajax furnace serviced in more than a year, book it before November, David’s fall schedule fills up and emergency calls in February cost more than a planned maintenance visit.
The honest answer depends on three things: the age of the furnace, the cost of the repair, and the efficiency of the current unit. As a rule of thumb, if a furnace is under 15 years old and the repair is under $600, repair almost always makes sense. If it’s over 20 years old and the repair is over $1,000, replacement usually wins, you’re spending money on old equipment that’ll need another repair within a year or two. The middle ground is trickier. An Ajax home running a 22-year-old furnace that needs a $500 draft inducer motor is right at the decision point, David will tell you the repair cost, estimate how much more life the unit realistically has, and let you decide. He won’t push replacement to get a bigger job. If the repair makes sense, he’ll say so.
For Durham Region’s climate, a 96% AFUE two-stage furnace is what David installs most often and what he’d choose for his own home. The heating season here is long and cold, running a 96% unit versus an 80% unit saves you roughly 20 cents of every dollar you spend on gas heating. Over a Durham Region winter, that adds up quickly. The 80% AFUE option is cheaper upfront by $400–$700, but it vents through a chimney or B-vent, which means a masonry liner may be required if you’re replacing an older unit, that cost can erase the savings entirely. The 96% unit runs on sealed PVC combustion air and exhaust, which is cleaner and more reliable. If your Ajax home has good insulation and modern windows, a two-stage 96% unit will modulate to lower output on milder days and deliver noticeably more even heat than a single-stage unit.
Most furnace replacements in Ajax take four to six hours from start to finish. That includes removing the old unit, setting the new one, connecting the gas line, wiring the controls, setting up the venting, priming the condensate system, and doing a full startup sequence with combustion testing. Homes with more complex situations, a chimney that needs a liner, custom ductwork modifications, or a difficult installation location, can run to a full day. David works alone on most installs, which means you’re not dealing with a two-person crew where one person knows what they’re doing and the other is learning. He won’t leave until the furnace is running correctly, the thermostat is confirmed, and you know how to operate your new equipment.
Yes. David works on all major brands, Lennox, Carrier, Bryant, Trane, York, Goodman, Keeprite, Rheem, Napoleon, and others. The diagnostic process is largely the same across brands: read the fault codes, test the components in sequence, confirm the gas pressure and combustion. Brand-specific quirks exist, some Lennox error codes behave differently than Carrier equivalents, and some older York models have inducer configurations that catch people off guard, but nothing David hasn’t seen. He carries ignitors, pressure switches, flame sensors, and capacitors that fit most common platforms. If a part isn’t on the truck, he’ll tell you what it is, what it’ll cost, and when he can get it. No mystery charges, no inflated parts markups that double the repair bill.
Cold air from the vents usually means the blower is running but the burners aren’t firing, or they fired and shut off on a safety limit. The most common causes are a dirty filter triggering the high-limit switch, a failed igniter, a faulty flame sensor that’s not detecting the flame after ignition, or a pressure switch fault on high-efficiency units. Start with the filter, pull it out and check it. If it’s clogged, replace it, reset the furnace by switching the thermostat off for 30 seconds and back to heat, and see if it starts normally. If it still blows cold, or the filter was clean, the furnace needs a diagnosis. In Ajax in January, David treats cold-air calls as urgencies, call (416) 508-4585 and he’ll tell you his realistic arrival time.
Leave the house immediately, don’t flip any light switches, don’t use your phone inside the home, don’t try to find the source yourself. Once you’re outside and clear of the building, call Enbridge Gas at 1-866-763-5427. They’ll dispatch an emergency crew to locate and shut off the leak. Once Enbridge has cleared the scene and confirmed it’s safe to re-enter, call David at (416) 508-4585 and he’ll come out to inspect the furnace, relight pilots if applicable, and confirm the appliance is safe before it goes back into operation. A gas smell near a furnace is almost always a fitting, valve, or connector issue, not a furnace explosion waiting to happen, but it needs to be treated as an emergency until Enbridge clears it. Never try to smell your way to the leak or use an open flame to find it.
Yes. Financing options are available for furnace installation, so a no-heat situation or an aging system doesn’t have to wait until you’ve saved the full amount. Most Ajax homeowners who finance a new furnace are looking at monthly payments that are often lower than what they were spending on gas with an inefficient old unit. David can walk you through the financing options when he comes out for the quote, there’s no pressure to decide on the spot. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
“Furnace died on a Thursday night in January. David was at our Ajax house by 10 the next morning, replaced the igniter, and it’s been running fine since.”
“I called three contractors before David. The first two wanted to replace the whole furnace. David came out, told me it was the draft inducer motor, quoted me $480, and had it running the same afternoon. He showed me the old part and explained exactly why it failed. My Ajax house is 1994-built and the furnace still had years left in it, I’m glad I didn’t let the other guys talk me into a new one.”
“Booked David for a furnace replacement at our place off Bayly. He quoted me on a Tuesday, the number was clear and itemized, and the install was done Thursday. Didn’t move anything I didn’t ask him to move. Left the utility room cleaner than he found it. The price on the invoice matched what he said it would be, to the dollar.”
David covers Ajax and every surrounding Durham Region community, same technician, same pricing, same standard of work.
Same-day service available. TSSA certified. Honest pricing. Call or book online.
