340 Quinnipiac Street / Building 33
Wallingford, CT 06942
203-815-6851

Local Reviews

Rated 5.0 out of 5 stars based on 563 customer reviews

Excellent

We’ve trusted Extreme Temp for over five years, and they’ve always been dependable and ready to help whenever needed. The quality of their work is excellent, and it’s a family-run business my parents also use and trust. Best company around—highly recommend!

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Reliable, competent, and customer-oriented

I’ve used Xtreme for all of my HVAC needs (new furnace, ductless and HW heater included. They are skilled, reliable, and straightforward. Their prices are transparent and reasonable

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Larry provided excellent service

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Always a true professional!

It’s comforting to have a reliable, efficient, affordable and timely service provider who is additionally polite and friendly! Andrew and his apprentice were a pleasure to welcome into our home!

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Quality Work

The technician did a great job and left the area clean after finishing the job.

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EXCELLANT service

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These guys are great!

Not only are we customers, but I referred my son to them when he found himself without heat They responded quickly and were able to fix the problem right away for him

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Terrific service

Terrific service. He went above and beyond in servicing my furnace.

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excellent service

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Excellent Service

Larry was very kind, knowledgeable, and friendly!

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Excellent service

Thorough on time and explain the the results of the cleaning. Carried himself professionally, took the time to explained everything.👍

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Excellent

There’s no better than X-TREME. Had my furnace serviced/cleaned today and I can honestly say the technicians were fantastic! They did a great job and explained to me in detail when I had a question. This is my third year doing my annual furnace cleaning I had other companies in the past but they didn’t compare. So glad found X-TREME

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Excellent service

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Great guy, informative and professional.

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Excellent Service

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Job Locations

Andrew H.

Andrew H. Job Checkin

Performed oil maintenance on boiler Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 8.2% o2 6ppm co 0 smoke


Larry H.

Larry H. Job Checkin

Removed and installed customer supplied thermostat. Started and checked the operation.


Larry H.

Larry H. Job Checkin

Inspected both furnaces and tested due to water in the basement. Both blower motors operated correctly and the burners started properly. There is evidence of water getting into both furnaces. Furnace closest to water line- -The circuit board appeared to get wet. - recommend replacing before premature failure. - Recommend removing the blower assembly and cleaning the floor of the furnace. - Recommend removing the insulation inside the blower compartment and replacing it. Furnace closest to the door- - The circuit board appeared to get wet, there are a couple of brown spots. - recommend replacing before premature failure. - Recommend removing the blower assembly and cleaning the floor of the furnace. - Recommend removing the insulation inside the blower compartment and inside the return plenum and replacing it.


Andrew H.

Andrew H. Job Checkin

Performed pm on oil boiler Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests While performing the maintenance we found 2 hi-vent that have corrosion on them showing they have leaked in the past and are no longer functioning properly. Found the oil shut off valve at the burner is not closing fully and is still leaking oil by to the strainer even when the valve is fully seated. Tested the autofeed and found it is not letting water through. Recommend replacing the oil shut off valve, 2 hi-vents, and autofeed and backflow combo.


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil boiler. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Oiled circulator. Drained water from the expansion tank. Started and checked the safeties. Performed a combustion test. 6.4% o2, 23 ppm, 0 smoke, 82.4% efficient System is operating properly.


Andrew H.

Andrew H. Job Checkin

Performed pm on oil boiler Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 8.4%o2 0 ppm While performing the maintenance we found extremely high levels of sludge and rust buildup at the oil filter canister. The entire canister was full of sludge and sediment. Had to blow out the oil line to get oil flowing into the new oil filter. Recommend getting a sludge additive for the oil tank.


Andrew H.

Andrew H. Job Checkin

Performed pm on natural gas furnace Brushed and vacuumed burner tubes Inspected and vacuumed burner, blower compartments and surrounding area Checked electrical connections and safeties Checked gas pressure Performed combustion test Inlet pressure- 6.836 in.w.c. Manifold pressure- 3.773 in.w.c. 10.8%o2 2ppm co


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil furnace and oil hot water heater. Brushed and vacuumed. Replaced the oil filter, nozzles and strainers. Replaced the air filter- customer supplied. Started and checked the safeties. Performed a combustion test. Furnace- 7.0% o2, 21 ppm, 87.9% efficient Hwh- 4.9% o2, 31 ppm, 87.2% efficient System is operating properly.


Andrew H.

Andrew H. Job Checkin

Performed pm on 2 oil boilers Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests Unit 1 - Unit 2-


Larry H.

Larry H. Job Checkin

Performed a Heating Pm on a Ductless Heat Pump System. Checked the air filters, customer washed them. Turned the indoor units to high heat with fan in high speed. Checked the electrical connections, checked the pressures and temps. Added 10 oz R410a to the system. With all units on, the heat was 119-121* System is operating properly.


Andrew H.

Andrew H. Job Checkin

Performed pm on oil furnace Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 7.2%o2 0ppm co 0 smoke While performing the maintenance we found a high amount of rust on the outside of the flue pipe. Also saw a hole starting to develop on a flue pipe T. Recommend having g a chimney person come and inspect the chimney. Also recommend replacing the flue pipe T and reducer. Took pictures and measurements 8inch T and 8-5 reducer Greg’s chimney 203 630 1976


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil furnace and oil hot water heater. Brushed and vacuumed. Replaced the oil filter, nozzles and strainers. Replaced the air filter- 16x25x1 Started and checked the safeties. Performed a combustion test. System is operating properly.


Andrew H.

Andrew H. Job Checkin

Performed pm on oil furnace Brushed and vacuumed flue pipe and heat exchanger Replaced oil filter, nozzle, and strainer Checked all electrical connections and safeties Performed combustion and smoke tests 6.8%o2 0ppm co 0 smoke


Larry H.

Larry H. Job Checkin

Customer noted that the domestic hot water is not as hot. The aquastat controls the temperature of the boiler loop which is operating properly. Adjusted the mixing valve and increased the temperature. The domestic coil gasket is leaking. Customer has well water and the gasket is corroded. It is not recommended on replacing the domestic coil due to the corrosion and condition of the boiler face. Recommend having a maintenance performed.


Larry H.

Larry H. Job Checkin

Customer turned the thermostat up, the boiler turned on and the circulator also turned on. Checked the water temperature coming out of the boiler to the mixing valve-187*, coming out of the mixing valve-102* the stem is seized on the mixing valve. Recommend replacing the mixing valve. Picked up part. Replaced the mixing valve. Adjusted the temperature at the sink to 122-124*.