Ajax’s housing stock runs heavily toward two-storey detached homes built through the 1990s and 2000s, and a lot of those original central air units are now hitting the 15-to-20-year mark, which is exactly when David gets the most calls. He covers all of Ajax and Durham Region, picks up the phone personally, and can often get out the same day.
David handles every job himself, installation, repairs, tune-ups, and emergency calls across the Town of Ajax.
David sizes and installs central air conditioning systems suited to Ajax homes, most of which have existing forced-air ductwork that needs to be assessed before any new equipment goes in. He’ll calculate the correct load for your home’s square footage and layout, not just swap in whatever unit is most convenient. Every installation includes a full commissioning check and a walkthrough of the new system.
Whether the compressor’s seized, the refrigerant is low, or the system keeps short-cycling, David diagnoses the problem and tells you what it’ll cost before he touches anything. He stocks common replacement parts on the truck, so most repairs finish in a single visit. Same-day appointments are available across Ajax and the surrounding area.
If your existing unit is beyond economic repair, David gives you a straight answer on replacement options without steering you toward the most expensive unit on the shelf. Many Ajax homes built in the 1990s still have R-22 systems that can’t be recharged under current regulations, and replacement is the only real path forward. David’ll walk you through the options that fit your home and your budget.
A spring tune-up before the Ajax summer heat arrives means you’re not discovering a failed capacitor on the first 30-degree day of the year. David cleans the coils, checks the refrigerant charge, inspects electrical connections, and confirms the system’s running at rated efficiency. It’s the one service call that’s almost always cheaper than the emergency it prevents.
Upgrading to a 18+ SEER2 system cuts cooling costs noticeably on a two-storey Ajax home that runs the AC from June through September. David’ll assess whether your existing ductwork and air handler can support a higher-efficiency unit, because pairing a top-tier condenser with undersized duct runs wastes the efficiency gain before you see it on a bill. He gives you the honest picture, not the upsell.
When the AC stops working in the middle of a July heat warning, you’re calling a real person who can actually help, not leaving a message with a dispatcher. David answers his own phone and prioritises emergency calls across Ajax. If you’ve got elderly family members or young kids in the house and the system’s down, tell him that when you call and he’ll get there as fast as he can.
Since 2011, David’s worked on hundreds of Ajax homes, a lot of them in the Pickering Village area and the newer developments off Rossland and Taunton, where builder-grade equipment from the early 2000s is now showing its age. He’ll tell you whether you need a repair or a replacement, and he won’t push the more expensive option just because it pays better.
Most central air conditioning systems in Ontario last between 15 and 20 years when they’re serviced regularly. Units that get a professional tune-up every spring, have clean filters changed on schedule, and run with adequate airflow through the system tend to reach the upper end of that range. Systems that get ignored until something breaks, run with dirty coils, or operate with refrigerant levels that have slowly drifted low over the years often fail closer to the 12-to-14-year mark.
Ontario’s climate puts particular stress on cooling equipment. We get genuinely hot and humid summers with stretches of 30-plus-degree days, and the AC runs hard from late June through early September. That’s a meaningful cooling season compared to further north. The shoulder season also matters, spring and fall humidity swings can cause condensate drainage issues that go unnoticed until they’ve done damage to the drain pan or nearby ductwork.
The most useful maintenance step for Ontario homeowners is a spring coil cleaning and refrigerant check before the first heat wave arrives. A dirty evaporator coil running even slightly low on refrigerant will ice over on a hot day, shut the system down, and leave you calling for emergency service on the worst possible afternoon. Catching it in May costs far less than fixing it in July.
A standard central air conditioner installation in Ajax runs between $3,500 and $6,500 for a mid-efficiency system on an existing forced-air setup, depending on the size of the home, the condition of the existing ductwork and air handler, and the efficiency rating you choose. High-efficiency units with SEER2 ratings of 18 or above can push the cost to $7,000 or higher, but they carry noticeably lower operating costs over their lifespan.
Repairs vary widely. A capacitor or contactor replacement, two of the most common failures, typically runs $200 to $400. A refrigerant recharge plus leak diagnosis sits in the $300 to $600 range depending on what refrigerant the system takes and how much it needs. Compressor replacement on an older unit often costs more than a new system, which is usually the point where David recommends replacement instead. He’ll give you those numbers before you make any decision.
Annual maintenance visits run $120 to $180 and cover everything needed to confirm the system’s ready for summer. 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.
The Town of Ajax grew rapidly through the 1980s, 1990s, and into the 2000s, which means a large portion of the housing stock is now 20 to 40 years old. Detached two-storey homes are the dominant form, many of them in the 1,800 to 2,400 square foot range, and a significant number were built with builder-grade air conditioners that were sized to meet minimum code rather than to optimally cool the home. David sees this regularly in the older sections of south Ajax near Harwood and Salem, where the original cooling equipment is now either at end of life or well past it.
One issue that comes up specifically in Ajax’s two-storey homes is second-floor cooling. Upper floors frequently run several degrees warmer than the main floor because the duct runs serving the second storey are undersized or poorly balanced relative to the rest of the system. Homeowners sometimes assume a new, larger AC unit will solve this, but the real fix is often a duct balance or the addition of a zoning damper system. Dropping a bigger condenser onto a duct system that can’t move the air properly doesn’t improve comfort, it just wastes money.
Ajax’s newer developments in the north end, particularly around Audley and Taunton, tend to have more recent equipment but David’s noticed that some of the 2005-to-2015 era new builds in that area used R-410A systems that are now facing refrigerant availability issues as the industry transitions away from high-GWP refrigerants. If your system is in that age range and you’ve been quoted a refrigerant recharge, it’s worth discussing the longer-term picture before spending money on a recharge for a unit that may face parts availability issues in a few years.
The most common warning sign David hears about from Ajax homeowners is the system running constantly without reaching the set temperature. On a hot day that’s working the system hard, some lag is normal, but if the AC runs all day and the house is still 26 degrees at midnight, the system either can’t handle the load, is low on refrigerant, or has a failing compressor. Each of those has a different repair path and cost, which is why a proper diagnosis matters before any work starts.
Short-cycling, the unit turning on and off every few minutes, usually points to a refrigerant issue, an oversized unit, or a failing control board. In Ajax’s older south-end homes where the original equipment was sometimes oversized to begin with, short-cycling has been a chronic problem that masked a fundamentally poor installation. A unit that short-cycles doesn’t properly dehumidify, which means the house feels clammy even when the thermostat says it’s cool. Durham Region summers are humid enough that dehumidification performance matters as much as temperature control.
Ice on the refrigerant lines or on the outdoor unit, unusual rattling from the condenser cabinet, water pooling near the indoor air handler, and a sudden spike in your electricity bill are all signs worth acting on quickly. Ice in particular tends to get worse fast, a partially iced coil restricts airflow, which causes more icing, which eventually stops cooling entirely and can damage the compressor if the unit keeps running.
Durham Region’s summer cooling season runs roughly from mid-June to mid-September, with the heaviest demand concentrated in July and August when lake-effect humidity compounds the heat. The practical implication for homeowners is that the AC doesn’t get much of a rest during those two months, and any deferred maintenance shows up as a breakdown exactly when the system’s working hardest. A spring tune-up in May, before the first heat advisory of the year, is the single most effective thing you can do to stay ahead of that.
Setting the thermostat to 24 or 25 degrees rather than 20 reduces runtime significantly without a meaningful drop in comfort, particularly when combined with ceiling fans that improve air circulation. Running the system’s fan on continuous low speed rather than auto mode can also help manage humidity on mild but damp days, the extended airflow over the evaporator coil pulls more moisture out even when the compressor isn’t running hard.
Keep the outdoor condenser unit clear. Ajax’s suburban yards often have gardens, hedges, and fences close to the unit, and restricted airflow around the condenser makes the compressor work significantly harder in hot weather. A 60-centimetre clearance on all sides is the minimum, more is better. Don’t plant anything near the unit, and trim back whatever’s grown in over the winter before summer starts.
Air conditioners don’t produce carbon monoxide the way gas furnaces do, but the refrigerant lines, electrical connections, and condensate drainage components all need to be in good shape to run safely. A refrigerant leak isn’t just an efficiency problem, modern refrigerants are potent greenhouse gases, and a leaking system is both environmentally harmful and a sign that something structural has failed in the system. TSSA licensing covers refrigerant handling in Ontario, which is one reason you want a licensed technician doing the work rather than someone who just has a set of gauges.
On the efficiency side, Ontario’s Enbridge and Hydro One programs have periodically offered rebates for high-efficiency cooling equipment, though the availability and amounts change year to year. At the time David last checked, rebates were available for qualifying heat pumps replacing older air conditioning equipment, which can sometimes make a heat pump replacement more financially attractive than a straight AC replacement. It’s worth asking about current program availability when you’re getting a quote, David’ll tell you what’s actually on offer, not what was available three years ago.
Ontario’s minimum efficiency standard for new air conditioners is 14.3 SEER2 as of 2023, which replaced the older 13 SEER standard. Any new installation David does meets or exceeds current requirements as a matter of course. If you’re comparing quotes, make sure every quote specifies the SEER2 rating of the proposed equipment, it’s a direct indicator of long-term operating cost and shouldn’t be buried in the paperwork.
Checking the simple things before calling saves time for everyone, work through these quickly before reaching out.
Make sure it’s set to Cool and the temperature is set below current room temperature. Check the batteries too, a weak battery causes erratic thermostat behaviour.
Your AC has a breaker in the main panel and an exterior disconnect box next to the outdoor unit. Check both are on.
A clogged filter blocks airflow and causes the evaporator coil to ice up, completely stopping cooling. Replace the filter and let the unit thaw for an hour before restarting.
The condenser unit outside needs clear airflow. Remove any debris, overgrowth, or objects within 60cm of the unit. Don’t hose it down while running.
Closed vents create pressure imbalances that reduce cooling and can damage the system. Make sure every supply vent in the home is open.
If none of the above got it running, it needs a licensed technician. David serves all of Ajax and Durham Region and answers his own phone.
Once a year, in spring, before the cooling season starts. That’s the honest answer for most Ajax homeowners with a standard central AC system. A spring tune-up covers the coil clean, refrigerant check, electrical inspection, and condensate drain flush, everything that tends to degrade quietly over the winter and shows up as a failure on a hot day in July. If you’ve got a heat pump that runs year-round, twice a year makes sense: once in spring before cooling season and once in fall before heating season. Skipping annual service doesn’t mean nothing will go wrong, it just means you’ll find out what went wrong at the worst possible time. The cost of a missed tune-up is almost always greater than the tune-up itself. David schedules spring maintenance visits across Ajax starting in April, booking early gets you a spot before the rush hits.
There are four likely causes, and each one has a different fix. First, check the air filter, a clogged filter starves the system of airflow and causes the evaporator coil to freeze, which stops cooling entirely. Second, low refrigerant from a slow leak reduces the system’s cooling capacity gradually, so the house gets less comfortable over time rather than stopping suddenly. Third, a failing capacitor or contactor means the compressor or condenser fan isn’t running at full speed or at all, which drops cooling output significantly. Fourth, the system may genuinely be undersized for the home, something that’s common in older Ajax houses where builder-grade equipment was installed to minimum specs. If the AC is running continuously but the house won’t cool below 24 or 25 degrees on a 32-degree day, the unit may simply lack the capacity for the home’s actual heat load. David can diagnose which of these applies and give you a straight answer on what fixing it looks like.
Most standard central air conditioner installations in Ajax take four to six hours for a straight swap on an existing forced-air system, meaning the furnace and ductwork are already in place and in good condition. David arrives, removes the old equipment, installs the new condenser and evaporator coil, makes the refrigerant connections, pulls the vacuum, charges the system, and commissions it before he leaves. The job takes longer if the air handler needs to be replaced at the same time, if there are duct modifications required, or if the electrical service to the AC needs to be upgraded. Most Ajax homeowners are back up and running the same day, typically by mid-afternoon if David starts in the morning. He’ll give you a realistic time estimate when he gives you the quote so you’re not waiting around not knowing when it’ll be done.
The standard rule of thumb is this: if the repair cost exceeds 50% of the value of a new system, and the unit is more than 10 years old, replacement usually makes more financial sense. But the actual decision depends on a few specific factors. How old is the unit? What refrigerant does it use? Is the compressor still in good shape or has it already been repaired once? Is the repair a one-time fix or a symptom of a system that’s about to start needing regular work? A capacitor replacement on an 8-year-old unit in otherwise good shape is an easy repair. A refrigerant recharge on a 17-year-old R-22 system with a slow leak is a different conversation, R-22 is no longer manufactured, the supply is limited, and the cost per kilogram makes repeated recharges uneconomic. David gives you the actual numbers for both paths so you can decide, not a recommendation designed to produce the bigger invoice.
For Durham Region’s climate, a SEER2 rating of 15 to 17 gives you a solid balance between upfront cost and operating efficiency for most homes. The minimum allowed for new installations in Canada is now 14.3 SEER2, so anything in that range or above is compliant. Going to 18 SEER2 or higher makes financial sense when you’re in a larger home, 2,000 square feet or more, where the AC runs hard for the full Durham Region cooling season and the efficiency savings accumulate quickly. For a smaller Ajax townhome or semi-detached, the payback period on a premium-efficiency unit can stretch to 10 years or more, at which point the efficiency investment may not return before the equipment needs replacement. David’ll run the numbers for your specific home and usage pattern so you’re making the decision with real data rather than a sales pitch for the most expensive unit available.
When the AC is clearly running, you can hear it, the outdoor unit is spinning, the air handler fan is blowing, but the air coming out of the vents isn’t cold, there are three main possibilities. The most common is low refrigerant: the system has a slow leak somewhere and the refrigerant charge has dropped below the level needed for effective heat transfer. You’ll usually notice this as a gradual decline in performance over a season or two rather than a sudden stop. Second possibility is a dirty evaporator coil, a coil caked with dust and debris can’t absorb heat properly, so even though everything’s running, the cooling capacity is reduced. Third is a refrigerant metering device failure, which is less common but causes the refrigerant to flood the coil incorrectly. All three require a licensed technician with proper diagnostic equipment to identify and fix, refrigerant work specifically requires TSSA licensing in Ontario, which David holds under Licence #000398183.
Yes, David services all major residential air conditioner brands, Lennox, Carrier, Trane, York, Goodman, Daikin, Bryant, American Standard, and others. The diagnostic and repair work on central AC systems is largely brand-agnostic at the component level: capacitors, contactors, refrigerant charge, coils, and control boards follow the same principles across brands, and David’s been doing this since 2011 across hundreds of homes throughout Ajax and Durham Region. The main exception is warranty work, if your unit is still under the manufacturer’s parts warranty, some brands require the repair to be done by a dealer-authorized technician to maintain coverage. David’ll tell you upfront if that applies to your situation so you don’t accidentally void anything. For out-of-warranty equipment, which covers the majority of service calls he gets, there’s no restriction on who performs the work.
Yes, financing options are available for air conditioner installations in Durham Region, including Ajax. A new central AC system is a meaningful upfront cost, typically $3,500 to $6,500 for a standard installation, and financing lets you spread that over monthly payments rather than covering it all at once. The specific terms available depend on your situation, so the best approach is to discuss it when David gives you the quote. It’s also worth asking about any current Enbridge or Hydro One rebate programs at the same time, qualifying equipment sometimes attracts rebates that reduce the net cost before financing is even applied, which changes the math on what makes sense to borrow. The best way to know what your specific job will cost is to get a free quote from David, no pressure, no obligation.
“AC quit on us during the July heat wave. David was at our Ajax house within a few hours, found a failed capacitor, and had it running before dinner.”
“Called David about our AC not cooling the second floor properly, a problem we’d had for years and just lived with. He came out, checked the duct runs, and explained that the issue was a balancing problem, not the equipment. Saved us from buying a new unit we didn’t need. Good guy, knows his stuff.”
“I’ve had contractors in the house before who leave a mess and you’re cleaning up after them for a week. David put down floor covers, kept everything tidy, and the price he quoted me before starting was exactly what I paid. For an AC replacement in Ajax that’s not nothing, I was expecting to get surprised on the invoice. Wasn’t.”
David covers all of Durham Region, if you’re near Ajax, he’s near you.
Same-day service available. TSSA certified. Honest pricing. Call or book online.
