Climate Diagnostics LLC
Open 24 hours a day, every day, this company handles furnaces, heat pumps and ductless mini-splits. Its work covers Carrier, Trane, Ruud and Mitsubishi units.
- Website checked
Heating contractors and plumbers for breakdowns.
Buffalo's heating and cooling emergencies are tied to its winters. In the historic December 2022 blizzard, National Grid said 108,000 western New York customers lost power, and in the October 2006 lake-effect storm about 227,000 customers had lost power by early Friday morning. When the grid goes down and comes back, furnaces, boilers and heat pumps are often the first things you need checked, and frozen pipes can follow a cold house. Before you hire in the city, know that the City of Buffalo's open data page says all mechanical contractors, including electricians, plumbers and HVAC, must be licensed within the City of Buffalo. Ask to see that licence before work starts, and ask for a written scope of the repair. If you rely on HEAP for a heating equipment repair or replacement, the work must be approved by your HEAP Local District Contact before it begins, so ask any contractor to wait for that approval.
Sources: National Grid (source, opens in a new tab), New York State Department of Public Service (source, opens in a new tab)
Open 24 hours a day, every day, this company handles furnaces, heat pumps and ductless mini-splits. Its work covers Carrier, Trane, Ruud and Mitsubishi units.
Emergency calls are taken, with furnace, air conditioning and water heater work. Service reaches Depew, Lancaster, Amherst and Clarence.
Boilers, heat pumps and ductless mini-splits sit alongside Mitsubishi and Amana units here. Emergency calls are answered, and a 2-year warranty applies.
Complete heating and cooling systems are installed for homes and businesses, including furnaces and ductless mini-splits. Founded in 2025, the firm offers financing.
In business since 1979, the company works on furnaces, boilers and heat pumps. Lennox, Carrier, Trane and Daikin units are part of its range.
Around-the-clock service runs Monday through Saturday, covering furnaces, boilers and heat pumps. Mitsubishi units are included, and the warranty runs 12 years.
Also serves St. Catharines–Niagara
Boiler work is the focus here, with service running around the clock, every day. Mitsubishi and Navien units are handled, and the firm has worked since 2015.
Furnace and boiler heating repair is the focus, alongside heated driveway and snow-melting systems. Financing is available, and free estimates are offered.
Furnace troubleshooting and no-heat calls are handled around the clock, every day. Service reaches Tonawanda, Lockport, Niagara Falls and Kenmore.
Furnace replacement and installation lead the work, with heat pumps and ductless mini-splits also covered. Emergency calls are taken, and service reaches Lockport, Depew and Lancaster.
Carrier and Heil furnaces are installed here, and the firm dates to 1958. Emergency service is offered, along with free estimates.
Residential heating and air conditioning have been the focus since 1965. Free estimates are given, and emergency repairs are covered too.
Also serves St. Catharines–Niagara
Furnace and gas leak repairs are the focus, with water heaters and tankless units also covered. Free estimates are given.
Also serves St. Catharines–Niagara
Operating since 1995, this family-owned firm works with Trane, Mitsubishi and Cummins equipment. It handles burst pipes and flooded basements, day and night.
Day and night, furnaces, boilers and heat pumps are covered. Lennox, Carrier, Trane and Rheem units are included, with a 1-year warranty.
Furnace and AC repair is the focus here, with boilers, heat pumps and water heaters also serviced. Founded in 2000 and family-owned, it offers same-day service.
Trane and Mitsubishi equipment is serviced, and emergency AC repair runs around the clock. Operating since 2005, it covers furnaces, boilers, heat pumps and ductless mini-splits.
Furnace, boiler and air conditioning installation and repair is handled here, with a 10-year warranty on new equipment. Free estimates are offered, along with second opinions.
Air conditioning repair and installation are the focus, with ductless mini-splits and furnaces also covered. Operating since 1987, the company offers emergency AC repairs.
Since 2018, this firm has handled HVAC and air conditioning work. Financing is available for heating and cooling, and the business is family-owned.
Heating and cooling contractor serving the Niagara Region and Hamilton, working on furnaces, air conditioning and HVAC systems.
Also serves St. Catharines–Niagara
Plumber whose website lists sump pumps, furnace repairs and installs, boiler service and air conditioning.
Insulation contractor whose website lists air conditioning and HVAC service.
HVAC contractor whose website lists furnace repairs and installs, boiler service, air conditioning and heating repairs.
HVAC contractor whose website lists boiler service, air conditioning, HVAC service and water heaters.
Lennox and Trane equipment is serviced by this family-owned company, which offers emergency service. It works day and night on furnaces, boilers and heat pumps.
Family-owned, this firm is open 24 hours a day and works on boilers, heat pumps and frozen pipes.
HVAC contractor whose website lists furnace repairs and installs, boiler service, air conditioning and heating repairs.
Furnaces, boilers, heat pumps and air conditioning are serviced in Niagara Falls and Buffalo, with emergency work offered around the clock, every day.
Also serves St. Catharines–Niagara
Lennox, Carrier, Rheem and Mitsubishi are among the brands installed here. Backup-power systems and emergency service are offered alongside furnaces and heat pumps.
HVAC contractor whose website lists furnace repairs and installs, boiler service, ductless mini-splits and air conditioning.
HVAC contractor whose website lists furnace repairs and installs, boiler service, air conditioning and HVAC service.
Air conditioning contractor whose website lists furnace repairs and installs, boiler service, heat pumps and ductless mini-splits.
Lennox equipment is part of the work at this company, founded in 1967 and family-owned. It serves Niagara Falls, Welland, Fort Erie and Thorold, and does commercial HVAC repairs.
Also serves St. Catharines–Niagara
Family-owned since 1985, the firm handles furnaces, boilers, ductless mini-splits and water heaters. Flooded basement work is offered too, and its towns include Amherst and Kenmore.
HVAC contractor whose website lists furnace repairs and installs, boiler service, ductless mini-splits and air conditioning.
Dating to 1933, the family-owned business handles air conditioning, furnaces and boilers. Generac and Kohler backup-power systems are offered too, and emergency service runs around the clock.
HVAC contractor whose website lists furnace repairs and installs, boiler service, heat pumps and ductless mini-splits.
Also serves St. Catharines–Niagara
Since 1973, the family-owned firm has operated from Tonawanda, and its work carries a 10 year warranty. Air conditioning and furnace calls are handled day and night.
Heating contractor whose website lists furnace repairs and installs, boiler service, heat pumps and ductless mini-splits.
HVAC contractor whose website lists sump pumps, furnace repairs and installs, boiler service and heat pumps.
Also serves St. Catharines–Niagara
HVAC contractor whose website lists furnace repairs and installs, boiler service, ductless mini-splits and air conditioning.
McAllister Plumbing, Heating & Cooling in Hamburg, New York, repairs sump pumps and sewer lines, installs and services standby generators, and works on furnaces, boilers and air conditioning across the Southtowns.
HVAC contractor whose website lists furnace repairs and installs, ductless mini-splits, air conditioning and heating repairs.
Plumber whose website lists sump pumps, air conditioning, battery backup sump pumps and water heaters.
HVAC contractor whose website lists furnace repairs and installs, boiler service, heat pumps and air conditioning.
HVAC contractor whose website lists furnace repairs and installs, boiler service, heat pumps and ductless mini-splits.
Plumber whose website lists sump pumps, furnace repairs and installs, air conditioning and HVAC service.
HVAC contractor whose website lists furnace repairs and installs, boiler service, heat pumps and ductless mini-splits.
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Have fuel-burning appliances such as a furnace or boiler inspected by a professional at least once a year.
Get written quotes from at least three contractors for the same work, and check references from recent clients.
Put it in a written contract: the work, price, deposit, start and finish dates, warranty, permits and clean-up. Paying cash to skip it leaves you no recourse.
The City of Buffalo's open data page says all mechanical contractors, including electricians, plumbers and HVAC, must be licensed within the City of Buffalo. Ask for the licence details before work begins, and check that they cover the type of work you need done on your system. City of Buffalo (Open Data Buffalo, Department of Permit & Inspection Services) (source, opens in a new tab)
HEAP has a Heating Equipment Repair or Replacement benefit. The work must be approved by your HEAP Local District Contact before it begins, and payment is made directly to the approved vendor. Do not let a contractor start the job until you have that approval in hand. The State of New York (source, opens in a new tab)
Ask for the address, the equipment involved, the problem found, the work to be done, parts and labour listed separately, and any warranty. Also ask how the contractor handles extra problems found mid-job, so a change to the work is agreed with you before it goes ahead.
Even in an emergency, try to get at least two quotes if you can safely wait. Compare the scope of work, the parts to be used, the warranty and the licence details, not only the headline figure. Ask whether a repair or replacement is being proposed, and why.