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

Local Reviews
for wallingford, ct

Rated 5.0 out of 5 stars based on 370 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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Great service

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

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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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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 service

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Great guy, informative and professional.

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Great job!

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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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Job Locations
for wallingford, ct

Larry H.

Larry H. Job Checkin

Checked the furnace, the zone panel was blank. Checked for power at the furnace and zone panel, the stair switch was on. Started to remove the firematic plate above the furnace and the lights lit up on the zone panel. Found loose wire connections in the wire nuts inside the box. Tightened all wires and the furnace started 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. 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

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

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

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


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 7.9%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 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 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