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

Local Reviews

Rated 5.0 out of 5 stars based on 553 customer reviews

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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Great job!

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Excellent Service!

I purchased my new HVAC system from Larry Halpin in 2018 and I have had them service my system each year. They are always very helpful whenever I call to set up my annual appointment.

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Excellent Service

Andrew is a very knowledgeable person and is very professional when he comes to our home to service our heating and cooling systems.

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Great service at a reasonable price

Fantastic service at a reasonable cost. The tec. Reviewed everything he did I was very satisfied and highly recommend Extreme to my family and friends.

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Always accommodating

We love the whole crew! Highly recommended

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Truly fantastic

Service was quick and efficient. He also took the time to show me a couple of area to watch out for.

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Excellent Service

Technician- Larry did an excellent job. He explained what was completed and next steps to keep my heating system running effectively. Highly recommend

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Wonderful help!

Timely, efficient, and kind. We appreciate the service and the care!

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HVAC PROFESSIONAL

Andrew has come to my house a number of times now to service my air-conditioning and heating units. He’s the most lovely young man. Professional, knowledgeable, the service was done in about 45 minutes and I always have peace of mind after he leaves knowing I’m going to be fine for the winter. He explains anything that’s wrong, that I need to do or any issues I may anticipate. Thank you Larry and Andrew Halpin and Jerry who also came and assisted.

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Great service

Quick, knowledgeable and went over options with me.

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Job Locations

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 very high levels of sludge at the oil filter canister. Also found some oil inside the burner by the oil pump. Cleaned up the oil and did not see any more leaking. The seal on the oil pump might be starting to go bad. Recommend reevaluating the pump next maintenance. Customer asked us to see if we could adjust the hot water temp. Upon investigation we found the balancing valve for the hot water coil was almost completely shut and was not adding much cold water to the hot line. Would recommend installing a mixing valve so water temps are more consistent. A balancing valve does not take the place of a mixing valve. Water temps were consistent around 115-120. Previous to adjusting the water temp was roughly 180*F


Larry H.

Larry H. Job Checkin

Performed a heating pm on a gas furnace. Cleaned the thermocouple, checked the gas pressures. Replaced the air filter. 16x25x1 Started and checked the safeties. Performed a combustion test. System is operating properly. While cleaning the thermocouple and relighting the pilot, the gas valve was not recognizing the pilot. Attempted to use 2 different thermocouples and holding the manual pilot button for up to 9 minutes and the gas valve did not see the pilot. The gas valve is bad. Picked up and replaced the gas valve. Started and tested. The system is operating properly.


Larry H.

Larry H. Job Checkin

Checked both furnaces and thermostats there was no codes on either furnace. Started and tested both several times and they started properly. Checked the program on both thermostats. The 1st fl was set to - less than 90% when it is a 90% 2 stage furnace. Changed the setting to more than 90%. The 2nd fl was set to single stage heat, the furnace is a 2 stage 90% furnace. With the very cold weather early in the morning, the 2nd floor was not keeping up and the cold air was falling down to the 1st floor. The thermostat downstairs was also reading 14% humidity which will make the room feel cold. Recommend installing a humidifier.


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 fittings for the hot water coil that are actively leaking and also saw the mixing valve at the coil is leaking. Brought the customer down and showed them the corrosion. Will work up a quote for fittings and mixing valve and a quote for a electric water heater


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil furnace. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 5.9% o2, 34 ppm, 0 smoke, 84.3% efficient System is operating properly.


Larry H.

Larry H. Job Checkin

Furnace was flashing 3 times when arrived, which is the pressure switch. Checked system and switch. When the inducer is running, it is drawing -.9 to -1.1 in wc of draft. The pressure switch closes at -.65. The inducer works correctly. Jumped out the switch and the burner starts. The pressure switch is closing intermittently and needs to be replaced. Called supplier for availability. Performed a heating pm on a gas furnace. Started and checked the safeties. Cleaned the flame sensor, checked the gasket pressures. Performed a combustion test.


Andrew H.

Andrew H. Job Checkin

Upon arrival the unit was on and running. While running we could hear large amounts of air in the heating pipes. Got a hose and bled all air out of both zones. Started the unit up and found the boiler was only heating up to about 130-140*F. Opened up the aquastat and found the high limit was set to 140 and the economy setting was turned up to 3 which will make the unit shut off at lower temps to save fuel. Turned the high limit up to 180* and turned the economy setting off. With the boiler only heating up to around 140 it will take very long to heat the house up. Connected to the Beckett primary control and found the primary control needed a software update. Updated the software and went through all settings to ensure it is properly functioning. Unit is working properly. When leaving boiler pressure was at 20psi


Larry H.

Larry H. Job Checkin

Performed a heating pm on an oil furnace. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 4.4% o2, 34 ppm, 83.1% efficient System is operating properly.


Andrew H.

Andrew H. Job Checkin

Upon arrival disconnected the wires for the old aquastat and removed the aquastat. Installed new aquastat and hooked up the wires. Ran hot water in the bathroom tub until the water heater aquastat called for heat. Let the domestic water heat up and tested it at multiple fixtures around the house to verify the water temps. Had consistent water temps ranging from 121-124. Watched the unit cycle on and off 4 times total to check water temps. Unit is working g 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 While performing the maintenance we found large amounts of sludge at the oil filter and the oil strainer. After getting customer authorization we added sludge additive to the oil tank.


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. 4.9% o2, 49 ppm, 0 smoke, 80.9% efficient System is operating properly. Because of how the boiler was originally installed, there is no way to perform a proper cleaning. I am unable to get the back clean out door off. I took the flue pipe off and cleaned the top section of the boiler


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 8.5%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. 9.6% o2, 20 ppm, 0 smoke, 82.6% efficient System is operating 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. System is operating properly. The pressure relief valve has a slow drip. The pressure/ temperature gauge is reading 25 psi. The temperature side of the gauge is broken. Could not tell if the pressure side is accurate.


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. 4.9% o2, 29 ppm, 0 smoke System is operating properly. While performing the maintenance we found the corrosion from the hot water coil has spread farther onto the boiler. The corrosion is now starting to form on one of the boiler clean-out covers. Could not remove 1 out of 3 clean-out covers. This section of the boiler will begin to get plugged with soot because of this and will eventually lead to performance issues. Showed the customer the corrosion on the boiler. Recommend replacing the boiler soon to avoid any issues with the corrosion.