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Heating and cooling emergencies in Greater Toronto

Heating contractors and plumbers for breakdowns.

100 pros in Greater Toronto

These heating and cooling companies serve Toronto and say on their own websites that they repair furnaces, boilers, heat pumps or air conditioners; one plumber on the list handles frozen pipes. In Ontario a furnace must be maintained by a TSSA-registered contractor, so check the registration before work starts. In Toronto, landlords must keep homes at 21°C or more from October 1 to May 15, and the December 2013 ice storm left more than 300,000 Toronto Hydro customers without power.

Source: City of Toronto (source, opens in a new tab)

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  6. Black Forest

    Black Forest is a family-owned plumbing company in Barrie, Ontario, handling basement flooding protection, backup power installs and heating and cooling emergencies, with work across the Greater Toronto Area.

    Also serves Barrie

    • Website checked

    Rated 5.0 out of 5 99 Google reviews · Nov 2026

    (416) 278-3180Website Black Forest (opens in a new tab)

  17. Smile HVAC

    The company offers a 10-year warranty and works with brands including Lennox, Carrier, Trane and Navien. Ductless air conditioners and water heaters are also among its jobs.

    Also serves Barrie

    • Website checked

    Rated 5.0 out of 5 1,381 Google reviews · Nov 2026

    (437) 777-4555Website Smile HVAC (opens in a new tab)
Show 80 more

  45. Go Lime

    Working with Lennox and Navien equipment, the company services furnaces, boilers, heat pumps and water heaters. Open around the clock, seven days a week, it serves Toronto, Mississauga, Brampton and Maple, with service in French.

    • Website checked

    Rated 4.8 out of 5 7,851 Google reviews · Nov 2026

    (877) 747-8292Website Go Lime (opens in a new tab)

Not yet verified. We checked each one’s own website for this work, and the licence in the public register where one applies, but we haven’t contacted them yet. How a business gets listed

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Before you hire

  1. In Ontario, furnaces and fuel-fired appliances must be serviced by TSSA-registered contractors; check a contractor’s registration in TSSA’s public lookup.

    Source: Technical Standards and Safety Authority (source, opens in a new tab)

Questions about hiring in Greater Toronto

Who can repair or replace a gas furnace?

In Ontario, a TSSA-registered fuels contractor, whose technicians hold TSSA gas certificates. Ask for the registration number and the technician's certificate before work starts, and check the company in TSSA's online contractor lookup. Heat pumps and air conditioners also involve electrical and refrigerant work, so ask what licences cover those parts of the job. Technical Standards and Safety Authority (source, opens in a new tab)

What should a repair or replacement quote include?

The diagnosis in writing, the parts and labour for each item, the model and size of any new equipment, permits, removal of the old unit, warranty terms for parts and labour, and when the work will be done. For a replacement, ask how the size was worked out rather than matching the old unit by default.

My rental is cold. Is there a minimum temperature in Toronto?

Yes. Toronto's Heating Bylaw requires landlords to keep units at 21°C or more from October 1 to May 15. If the heat is not working, tell your landlord in writing first; if it stays cold, you can contact 311 to ask the City to investigate. City of Toronto (source, opens in a new tab)

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Heating and cooling emergencies in other cities