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

Local Reviews

Rated 5.0 out of 5 stars based on 566 customer reviews

Great service!

Larry was on time and very professional. They reached out ahead to confirm as well, which was nice. He provided the requested testing/tune up and was able to help with some minor issues that were discovered, right then and there. I would highly recommend.

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Very happy with Andrew

This was my second experience with the company and with Andrew. He was pleasant, straightforward and answered my questions for me to understanding my systems.

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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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Job Locations

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. 5.4% o2, 29 ppm, 84.6% efficient System is operating properly.


Andrew H.

Andrew H. Job Checkin

Upon arrival unit was on but was off on reset. Pushed the reset button and the unit started up but was rumbling slightly. Checked oil flow at the burner and had a clean and steady stream. Checked the ignition transformer and it was good. Checked the nozzle and found carbon and oil buildup on the nozzle and in the blast tube. Replaced the nozzle and cleaned up all carbon and oil residue. Started the unit and performed combustion and smoke tests. Unit is working properly. 7.1%o2 1ppm co 0 smoke


Larry H.

Larry H. Job Checkin

Furnace was off due to the flue rollout switch was tripped. Replaced the rollout switch. Started and tested. If the problem happens again, recommend replacing the inducer motor due to the high amps that it is drawing while running.


Larry H.

Larry H. Job Checkin

Performed a heating pm on (2) Gas Furnaces. Checked the electrical connections, cleaned the flame sensors. Checked the gas pressures. 1st- 6.8” wc incoming/ 3.1”wc manifold 2nd- 6.7”wc/ 1.7”/ 3.3”wc manifold Started and checked the safeties. Performed a combustion test. 1st- 9.3% o2, 13 ppm, 78.5% efficient 2nd- 11.3% o2, 13 ppm, 94.0% efficient System is operating properly. While performing the maintenance, noticed the 2nd fl furnace did not have a service switch or any way the turn the power off except for going to the breaker panel to kill the power. Installed a 2x4 box, switch and a gas switch plate at the furnace. When the blower turns on for the 2nd fl furnace, there is an arcing noise coming from the relay on the circuit board. Recommend replacing the board before it goes bad.


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 10.2%o2 0ppm co 0 smoke While performing the maintenance the customer stated they were having issue with the second floor thermostat. The display was not coming on. Took the thermostat from the first floor and tested it on the second floor subbase. With the thermostat switched it powered on indicating the thermostat is faulty. After getting customer authorization we replaced the second floor thermostat with a new one. Programmed the thermostat and tested operation. Unit is working properly


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. 4.6% o2, 39 ppm, 80.5% efficient System is operating properly. While performing the maintenance, noticed the circulator gaskets are corroded. Recommend replacing them.


Andrew H.

Andrew H. Job Checkin

Performed pm on gas boiler Brushed and vacuumed burner tubes Inspected and vacuumed burner, blower and surrounding area Checked electrical connections and safeties Checked gas pressure Cleaned and inspected flame sensor Performed combustion test Inlet pressure- 8.215 in.w.c. Manifold pressure- 3.435 in.w.c. 11.3% o2 0ppm co


Andrew H.

Andrew H. Job Checkin

Upon arrival customer stated the thermostat was following a schedule despite them never programming one. Went through the settings and could not find the setting for turning the schedule off even after resetting the thermostat. After talking with the customer we found they typically leave the house at a constant temp and don’t often change the temp set point . Went into the schedule and set all set points at 72 so the thermostat will always keep the house at a consistent temp. If the thermostat has any other issues it will need to be replaced. Told customer to call within a month is any issues arise or they still want a new thermostat. When attempting to go in with the paperwork we found the thermostat had adjusted itself and set the set point to 83 without anyone touching it. Physically watched the thermostat set point going from 83 to 72 and back showing the thermostat is definitely malfunctioning. After getting customer authorization we replaced the thermostat with a new one. Turned


Andrew H.

Andrew H. Job Checkin

Installed a Fujitsu AOUH09, 9,000 BTU (-15) condenser and indoor unit. Installed a line set, condensate pump and drain line. Pressure tested, evacuated the system. Started and tested. There was 125*f coming out of the indoor unit. System is operating properly.


Andrew H.

Andrew H. Job Checkin

Removed old circuit board and installed a new circuit board. Started and tested the unit. Unit is working properly.


Larry H.

Larry H. Job Checkin

Removed and installed a new Burnham IQ Board. Started and tested. System is operating properly


Andrew H.

Andrew H. Job Checkin

Performed heating 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 the customer stated they heard a small amount of air in the heating pipes. After getting customer authorization we bled all zones of any air. Started and tested the system. Had hot water coming back on all zones. When leaving the boiler was at 21psi


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