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

Local Reviews

Rated 5.0 out of 5 stars based on 567 customer reviews

Excellent quick service

Thank you for responding so quickly. Much appreciated.

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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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Job Locations

Andrew H.

Andrew H. Job Checkin

Performed pm on oil water heater 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 9.9%o2 0ppm co 0 smoke Would recommend replacing the water heater soon. It is from 2009 and oil water heaters typically last around 15years.


Larry H.

Larry H. Job Checkin

Checked the zones and thermostats. The zone valve operates correctly for the back room. Tried to purge the zone, the back room radiator is frozen. The pipe goes into the garage.


Larry H.

Larry H. Job Checkin

When arrived, the burner was running for 4 minutes. Checked the history of the control, there was several times when the burner as running for only 3-10 seconds then shut off for end of heating cycle. Checked the zone valves and thermostats. The zone valve for the entry was getting 24 volts for a second then dropped out then 24 volts for a second. Jumped out wires in the thermostat to check operation. When handling the thermostat, the low battery light came on. Replaced the batteries, checked for power at the zone valve and system operated properly.


Andrew H.

Andrew H. Job Checkin

Brushed and vacuumed burner tubes Inspected and vacuumed burner, blower compartments and surrounding area Checked electrical connections and safeties Checked gas pressure Cleaned and inspected flame sensor Performed combustion test Inlet pressure- 7.597 in.w.c Manifold pressure- 3.094 in.w.c. 11.5%o2 5ppm co


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

Valved water heater. Removed and replaced the drain valve. Filled and checked for leaks.


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 8.9%o2 1ppm co 0 smoke


Larry H.

Larry H. Job Checkin

Water was coming from the drain on the indirect water heater. Tightened the handle a little more and the leak stopped. Installed a drain cap on the valve.


Andrew H.

Andrew H. Job Checkin

The customer removed the condenser fan assembly before we arrived. Found 2 wires were broken going to the fan motor. Repaired the wires and started. The system started properly. Checked the defrost timer. 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. 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.