Furnace and AC Service in Ajax
Most of Ajax was built from the 1970s onward, with south Ajax near the waterfront, central neighbourhoods from the 80s and 90s, and newer streets in north Ajax. We service and replace furnaces, ACs, heat pumps and water heaters, and run gas lines.
- TSSA licensed & insured
- 20+ years in the GTA
- 24/7 emergency service
- 1-year labour warranty
- Registered Home Renovation Savings contractor
No heat, no cooling, or planning a replacement?
What do you need in Ajax?
Tap a service to see how we can help.
Furnace repair and replacement in Ajax
Heat not working or a furnace that is 15+ years old? We diagnose, repair and install high-efficiency furnaces.
Central air and AC repair in Ajax
Installation, repair and seasonal tune-ups so every room stays cool.
Heat pumps, including ductless in Ajax
One system for heating and cooling, sized for your home. Ask us about rebates.
Tank and tankless water heaters in Ajax
Repair and replacement, including converting a rental to an owned unit.
Boilers and combi boilers in Ajax
Installation, servicing and repair for hydronic heating.
Gas piping in Ajax
Gas lines for BBQs, ranges, dryers and fireplaces, installed to code.
What we see in Ajax
- South Ajax: 1970s homes with equipment replaced at least once, and lakeside air that’s hard on outdoor units.
- Central Ajax: 80s and 90s homes where furnaces, ACs and water heaters are often all due within a few years of each other.
- North Ajax: newer builds with builder-original equipment and HRVs.
- Gas lines for BBQs, ranges and dryers. Our post on gas line work in Ajax covers what’s involved, and furnace safety checks before winter is worth a read in the fall.

What we do in Ajax
- Furnace repair and replacement
- Central air conditioning and heat pumps, including ductless
- Tank and tankless water heaters (Rinnai Pro certified)
- Boilers and combi boilers
- Gas lines for BBQs, ranges, dryers and fireplaces
- Humidifiers, filtration and HRVs
Rebates
We’re a registered contractor with Home Renovation Savings, so qualifying heat pump and high-efficiency upgrades can come with rebates. Programs and amounts change during the year, so we check what applies to your home when we quote. Estimates for new installations are free, and financing is available.
Areas we cover in Ajax
- South Ajax
- Pickering Beach
- Central Ajax
- Nottingham
- Riverside
- Northeast Ajax
- Northwest Ajax
- Discovery Bay
What our customers say
Questions we get in Ajax
Can you add a gas line for my BBQ?
Yes, with a shut-off, quick-connect outlet and pressure test.
Do you service HRVs?
Yes.
Do you offer financing?
Yes. See our financing page.
Ready to book in Ajax?
📍 Nearby Service Areas
Aurora Star Tech also serves these communities near Ajax: