Furnace & AC Repair in Newmarket

Air Net Heating and Air Conditioning repairs furnaces and central air conditioners in Newmarket, Ontario. Newmarket is the most northerly town we serve: our technicians travel up Highway 404 or Yonge Street from Richmond Hill, so calling early in the day gives you the best chance of a same-day visit. We answer the phone from 8am to 8pm, seven days a week, and quote a flat rate before any work begins.

Furnace and AC services in Newmarket

• Furnace repair: No heat, short cycling, ignition problems, strange noises, and all brands repaired.
• AC repair: Not cooling, not turning on, refrigerant leaks and electrical problems.
• Installation: New Lennox and KeepRite furnaces and air conditioners, usually installed within 24–48 hours. See furnace and AC installation.
• Tune-ups: Yearly furnace and AC maintenance to prevent breakdowns. See furnace and AC tune-ups.

Why Newmarket homeowners choose Air Net

• Same-day repairs: We’re based in Richmond Hill, a short drive down Yonge Street, so most Newmarket repair calls get a visit the same day.
• Licensed & TSSA registered: Our G2 gas technicians repair all furnace and AC brands.
• Upfront flat-rate pricing: You get the price before any work starts. No surprises on the bill.
• Warranty you can count on: 1 year on labour, manufacturer warranty on new equipment, and a 10-year parts warranty on Lennox installs.
• 30 years in York Region: Highly rated on Google by our customers.

From the field: furnace repair in Newmarket

A Newmarket homeowner called us because their furnace was turning on but not producing any heat.

What we found: A faulty gas valve. It wasn’t opening properly, so the burners never got the gas they needed to light.

How we fixed it: We checked the heating sequence, tested the gas valve along with its power supply and control signals, and confirmed the valve itself had failed. We replaced it, completed the required gas leak and safety checks, and ran the furnace through multiple heating cycles.

The result: Reliable burner ignition and consistent heat throughout the home.

Areas we serve in Newmarket

We service homes across Newmarket, including Stonehaven, Woodland Hill, Summerhill Estates and Glenway, as well as nearby Aurora, King City and Richmond Hill.

Need furnace or AC repair in Newmarket?

Call 416-791-1609. We’re open 8am to 8pm, 7 days a week.

Heating and cooling in Newmarket homes

Newmarket has some of the older houses in York Region around Main Street, alongside large subdivisions from the 1980s to the 2000s such as Glenway, Summerhill and Woodland Hill. In an older house, a furnace repair or replacement is a good moment to have the venting checked, because chimneys and vents were often built for equipment that has since been changed. In the newer subdivisions, the more common question is whether an original furnace or air conditioner is worth one more repair.

Common AC problems we fix in Newmarket

Hot, humid summers are hard on central air conditioners. These are the problems we see most often in Newmarket:

• Blowing warm air: often a refrigerant leak, a dirty coil or a failed electrical part.
• AC won’t turn on: usually a bad capacitor or contactor, a tripped breaker, or a thermostat problem.
• Water leaking near the furnace: usually a clogged condensate drain line.
• Weak airflow: a dirty filter, a frozen indoor coil or a blower problem.
• Strange noises: worn fan motors, loose parts or debris in the outdoor unit.
• Running nonstop or turning on and off: a dirty outdoor coil, low refrigerant or a thermostat issue.

We find the cause and give you an upfront flat-rate price before any work starts. Our guide AC running but not cooling? explains the first things to check.

Furnace and AC repair in Newmarket: common questions

Do you offer same-day furnace repair in Newmarket?
Yes, for most repair calls. We’re based in Richmond Hill, a short drive south of Newmarket, so we can usually visit the same day. We’re open 8am to 8pm, 7 days a week.

How much does furnace or AC repair cost?
We use upfront flat-rate pricing. You get the price before any work starts, so there are no surprises on the bill.

Do you repair all brands?
Yes. Our G2-licensed, TSSA-registered technicians repair all furnace and central AC brands. For new installs, we put in Lennox and KeepRite equipment.

What warranty do you give?
1 year on labour, the manufacturer’s warranty on new equipment, and a 10-year parts warranty on Lennox installs.

Should I repair or replace my old furnace?
It depends on the furnace’s age, how often it breaks down, and the repair cost. We’ll give you an honest recommendation, and our guide Repair or replace your old furnace? explains how to decide.

Do you offer 24-hour emergency service?
No. We’re open 8am to 8pm every day. Call 416-791-1609 during those hours and we’ll get to you as quickly as we can.

Our office: 39 Oneida Crescent, Richmond Hill, ON L4B 4T9