Trusted HVAC services in Markham

Most AC repairs come down to a failed capacitor or contactor, a dirty outdoor coil, a blocked condensate line or low refrigerant from a leak. Our 313A-certified mechanics test the electrical parts and the refrigerant charge, find any leak before adding refrigerant, and give you a flat price for the fix.

Many original late-1990s air conditioners still use R-22, which is no longer produced, so recharging a leaking unit keeps getting costlier and replacement is usually the better spend.

For air conditioner installation in Markham, we match the new outdoor unit to your furnace blower and indoor coil and size it to the house. An oversized AC short cycles and leaves upstairs bedrooms clammy. In Cornell, where many homes have rear lanes and compact yards, we also plan the condenser spot around clearances and neighbours.

A heat pump makes the most sense when your central air conditioner is due for replacement. A cold-climate model sits where the old AC was, uses the same ducts, cools all summer and keeps heating well below freezing, with your gas furnace as backup on the coldest nights.

This dual-fuel setup suits homes with a good high-efficiency furnace. We compare SEER2 and HSPF2 ratings and check that the electrical panel can take the load.

Ductless mini-splits handle the spaces ducts don’t reach well: a finished basement, a room over the garage, or an older house heated by radiators with no ducts for cooling.

Eligible heat pumps may qualify for rebates through the Home Renovation Savings Program from Save on Energy and Enbridge Gas. Amounts depend on your home and current heating fuel, so we check before you buy. Our guide to heat pump rebates explains the program.

Beyond furnaces and air conditioners, we repair and replace boilers and radiant floors, tank and tankless water heaters, and the humidifiers, filters and ventilators that keep indoor air healthy, with the same licensed technicians, flat-rate pricing and written warranty on all of it.

Boilers and radiant heat

Some older Unionville homes still heat with cast iron radiators, and some larger newer homes run in-floor radiant heat. We service pumps, zone valves, expansion tanks and controls, and size condensing or combi boilers to the home’s heat loss.

Water heaters: tank or tankless

A gas tank lasts about 8 to 12 years and a tankless unit about 20 with yearly descaling. Tankless suits big households if the gas line and venting can handle it, which we check first. Our water heater installation page compares both.

Indoor air quality

Winter air gets very dry, and tighter newer homes trap cooking smells and moisture. A humidifier on a humidistat, a higher-MERV media filter or an HRV for fresh air treats the whole house at once.

Our HVAC services in Markham include emergency calls: no-heat and no-cooling emergencies are answered 24/7 and booked ahead of routine work. While you wait, a few quick checks can sometimes restore heat or cooling, but a gas smell or carbon monoxide alarm always comes first.

• No heat: set the thermostat to heat, a few degrees above room temperature, and check the furnace switch, breaker and filter.
• No cooling: check the outdoor breaker and the filter, and if the lines or coil are iced, turn the AC off to thaw.
• Gas smell: leave the house now, without flipping switches or using your phone inside. From outside, call Enbridge Gas at 1-866-763-5427.
• Carbon monoxide alarm: get everyone outside and call 911 before anything else.

Once Enbridge or the fire department says the house is safe, we repair the equipment. Ontario requires carbon monoxide alarms in homes with fuel-burning appliances; see the province’s carbon monoxide safety page (opens in a new tab).

What your home needs depends a lot on when it was built. Heritage houses in Unionville and Markham Village tend to have tight basements and older ductwork, while the big subdivisions of the 1990s and 2000s still run many original furnaces and air conditioners that are now near the end of their lives.

Those village areas and Thornhill include heritage conservation districts, where changes visible from the street can need approval; the City of Markham (opens in a new tab) can tell you what applies.

Milliken and much of Thornhill were built out from the 1960s to the 80s, and plenty of those houses now run a second furnace on the original ducts, with few upstairs returns.

Berczy Village, Angus Glen, Cachet, Box Grove, Greensborough, Wismer and Cathedraltown are newer, with large two-storey homes and finished basements that one furnace and one AC struggle to keep even. Cornell and Markham Centre add townhomes and condos with compact mechanical closets.

The problems we fix most often follow the age of the homes: aging builder-grade furnaces, leaking R-22 air conditioners, warm second floors and blocked drains on high-efficiency equipment. Each has a clear cause and a flat price before any repair.

• Short cycling: a dirty flame sensor, a clogged filter or an oversized furnace makes it start and stop every few minutes.
• No ignition: hot surface ignitors crack with age, and a failed inducer motor or pressure switch stops the furnace from lighting.
• Hot upstairs bedrooms: homes with few upstairs returns lose cooling on the way up, and balancing or blower settings often fix it.
• Refrigerant leaks: R-22 units are costly to recharge, so we price repair and replacement side by side.
• Frozen AC coil: low airflow or low refrigerant ices the indoor coil and stops the cooling.
• Blocked condensate line: a clog or failed condensate pump can shut down a high-efficiency furnace or soak a finished basement.

Repair usually makes sense when a system is well within its typical lifespan and the part is minor. Replacement makes sense when it’s near the end of that lifespan, needs a major part like a heat exchanger or compressor, or keeps breaking down. We always give you both prices side by side.

In many late-1990s homes, the furnace and AC went in together and are wearing out together. Replacing both, or pairing a new furnace with a heat pump, means one installation and a matched system.

The cost of HVAC work depends on the equipment, the size and layout of the home, any venting, ductwork or electrical changes, and access to the mechanical room. We diagnose or measure first, then give you a flat-rate price, so you never pay for a guess.

Every quote for HVAC services in Markham is a flat-rate price you approve before work starts. It doesn’t change halfway through, and if rebates apply, we help with the paperwork.

HVAC maintenance works best as two visits a year: a heating tune-up in the fall and a cooling tune-up in the spring. Our maintenance plan covers both with priority booking, so worn parts get caught before the first cold snap or heat wave, not during it.

The fall visit cleans the burners and flame sensor, inspects the heat exchanger and tests the safety controls. The spring visit cleans the outdoor coil, checks refrigerant pressures and clears the condensate line. Many manufacturers also require yearly maintenance to keep the warranty valid. See what’s in our HVAC maintenance plan.