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

Local Reviews

Rated 5.0 out of 5 stars based on 564 customer reviews

Great service

Andrew got right to work. I observed that he was also sharing his knowledge with his helper.

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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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Job Locations

Larry H.

Larry H. Job Checkin

Customer had a smell in the house. The burner turned on for 30 seconds then shut off. Found the blower motor was not turning on. Checked for power at the board. The relay clicks but no output power from the board to the motor. Jumped out the motor and it does start properly. Tied the blower motor wire directly into power to get the customer heat. The circuit board needs to be replaced. The supply houses are closed. We will call them on Monday.


Larry H.

Larry H. Job Checkin

The burner was running when arrived. Checked the oil flow, and transformer. The transformer is showing signs of getting weak. Recommend replacing in the future. Removed the nozzle assembly and found the nozzle all black with carbon on the on the end cone. Replaced the nozzle, started and tested.


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 8.7o2 2ppm While performing the maintenance the customer stated they heard air in the heating pipes. Could not purge air out of the heating loop because 2 isolating valves for both halves of the loop are corroded. Did not want to touch them due to fear of leaking water. Need to return to install 2 new isolating valves on the return piping. Also found some fittings by the mixing valve are heavily corroded and need to be replaced. Took pictures to work up an estimate for total repairs. Needs 3/4 valves


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 7.9%o2 0ppm co 0 smoke


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil boiler. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 4.4% o2, 14 ppm, 83.2% efficient System is operating properly.


Larry H.

Larry H. Job Checkin

Open boiler door and remove old combustion chamber. Clean and vacuum soot and any debris from the old chamber. Install new combustion chamber and gaskets. Close burner door and start the boiler. Run the boiler for at least 20 minutes continuously to let the new chamber and gaskets cure. Performed a combustion test. 3.8% o2, 51 ppm, 0 smoke, 84.3% efficient


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 9.4%o2 1ppm co 0 smoke While performing the maintenance we found a bird inside of the furnace and some remains of a bird nest inside the flue pipe. Recommend having a chimney person come and inspect the chimney. Greg’s chimney 203 630 1976


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 7.7%o2 0ppm co 0 smoke


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 7.9%o2 0ppm co 0 smoke Upon arrival customer stated the compression fitting at the oil filter was slightly leaking oil. Took the fitting apart and inspected it. Fitting looked good still but we did see a small amount of oil residue on the oil line. Also saw a small amount of oil coming from the bleeder screw on the filter canister. Put a small amount of pipe dope on the threads to help create a better seal. Sprinkled oil absorbing powder down and watched the fitting for the remainder of the maintenance. Fitting is not leaking oil any more.


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 8.8%o2 2ppm co 0 smoke Electric Water heater with leak break vs without


Larry H.

Larry H. Job Checkin

The furnace was off on a roll out error code. Found the exhaust roll out tripped. Reset and the furnace started. Checked the temp at the switch, 129*f, the switch is rated for 215*f. The inducer motor is drawing 1.9 amps and rated for 1.8 amps. Performed a combustion test. Recommend replacing the rollout switch due to possibly tripping at a lower temperature and recommend replacing the inducer motor due to the higher amps which can cause the motor to overheat and slow down and possibly cause the roll out to trip.


Andrew H.

Andrew H. Job Checkin

Upon arrival unit was on and customer stated they had no heat to the downstairs area. Found the zone valve had 24v going to it and the end switch was closing causing the aquastat to send power to the circulator pump. Checked power at the aquastat and had 120v. Checked the circulator pump and found it had no voltage. Bypassed the aquastat and jumped the circulator pump and the pump turned on showing the aquastat is bad and not sending power. After getting customer authorization we replaced the old aquastat with a new one. Turned the unit on and the unit started working properly. Purged some air out of the basement zone. Started and tested the system. Had hot water coming back on the return for the lower section of the zone. When leaving boiler pressure was at 19psi


Andrew H.

Andrew H. Job Checkin

Upon arrival customer stated they saw some smoke/soot coming from the baseboard heaters. What they saw was just dust buildup getting heated up by the baseboards warming up and is typically more common at the beginning of the season. The baseboards cannot make smoke or soot. Customer asked us if we could perform a maintenance on the natural gas boiler Performed pm on natural gas boiler Brushed and vacuumed burner tubes Cleaned and inspected flame sensor Inspected and vacuumed burner compartment and surrounding area Checked electrical connections and safeties Checked gas pressure Performed combustion test Inlet pressure-8.158 in.w.c. Manifold pressure- started at 3.6 adjusted it to 2.696 in.w.c. To make to unit run clean 7.3%o2 12ppm co


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.