Keep Your Home Comfortable With Quality HVAC Services In Wallingford CT
X-Treme Temp Heating & Cooling is your go-to HVAC service provider in Wallingford, CT! We’re the experts in home comfort year-round, from AC and heating repair to ductwork and water heaters. We’ve got you covered from installation to maintenance so you can have peace of mind about your heating and air conditioning.
Read the reviews below from Wallingford, CT residents to see what your neighbors say about our expertise and customer service. We can’t wait to work with you!
Local Reviews
for Wallingford, CT
Our Reviews by City
Great service!
Eileen - Wallingford, CT 06492
As always Andrew and his apprentice were welcome professionals to our home. Communication, timeliness, expediency, neatness, and price all great.
Very satisfied
Piroska - Wallingford, CT 06492
Larry came on time, and fixed the problem quickly and professionally. I had excellent experience with him and I can’t thank enough to Lisa . Definitely recommend to anyone !!
Excellent service
Paul - Wallingford, CT 06492
Arrived on time. Appeared to know exactly what to do. Excellent and friendly service.
Great service!
Seamus - Wallingford, CT 06492
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.
Great service
Bill - Wallingford, CT 06492
Andrew got right to work. I observed that he was also sharing his knowledge with his helper.
Reliable, competent, and customer-oriented
Marisa - Wallingford, CT 06492
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
Larry provided excellent service
Lia - Wallingford, CT 06492
Always a true professional!
Eileen - Wallingford, CT 06492
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!
EXCELLANT service
Lori - Wallingford, CT 06492
These guys are great!
Suzanne - Wallingford, CT 06492
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
Terrific service
Jamie - Wallingford, CT 06492
Terrific service. He went above and beyond in servicing my furnace.
excellent service
rmiller7861 - Wallingford, CT 06492
Excellent Service
Brooke - Wallingford, CT 06492
Larry was very kind, knowledgeable, and friendly!
Excellent service
Otto - Wallingford, CT 06492
Thorough on time and explain the the results of the cleaning. Carried himself professionally, took the time to explained everything.👍
Excellent service
peter - Wallingford, CT 06492
Great guy, informative and professional.
mark - Wallingford, CT 06492
Great job!
Jane - Wallingford, CT 06492
Excellent Service
Sue - Wallingford, CT 06492
Andrew is a very knowledgeable person and is very professional when he comes to our home to service our heating and cooling systems.
Great service at a reasonable price
Ron - Wallingford, CT 06492
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.
Always accommodating
Dorene - Wallingford, CT 06492
We love the whole crew! Highly recommended
Truly fantastic
deann - Wallingford, CT 06492
Service was quick and efficient. He also took the time to show me a couple of area to watch out for.
Excellent Service
Brian - Wallingford, CT 06492
Technician- Larry did an excellent job. He explained what was completed and next steps to keep my heating system running effectively. Highly recommend
Wonderful help!
Amelia - Wallingford, CT 06492
Timely, efficient, and kind. We appreciate the service and the care!
HVAC PROFESSIONAL
Allyson - Wallingford, CT 06492
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.
Fast scheduling
brian - Wallingford, CT 06492
Larry H.
When arrived, the condensate pump was unplugged and the reservoir was empty. Turned the water back on to the humidifier to check if the humidifier was leaking. When I went back down with some water to test the pump, there was water on the ductwork. The humidifier was not leaking, turned the water back off. Found a crack in the bottom of the reservoir on the new pump. Notified the homeowner of the crack and that they need to return it. Removed the drain hose and blew through the line which runs to the washer drain line. The drain line is clear. The water is coming from the bottom of the new pump.
Andrew H.
Disconnected flue pipe and removed current flue pipe T, draft damper, and reducer. Install new flue pipe T, draft damper, and reducers. Reconnect the flue pipe and start and test the system for proper operation.
Larry H.
Customer has to hit the reset button occasionally, the system was running when arrived. Checked the fuel flow and transformer, both ok. Removed the nozzle assembly and there was some carbon on the tip and the tip was black. There was also oil in the bottom of the blast tube, all indicating the the nozzle was not spraying oil correctly into the chamber. Replaced the nozzle and cleaned the assembly. Started and tested. System is operating properly. The furnace is 25+ yrs old. Recommend replacing the system.
Andrew H.
Upon arrival unit was on but not running. Turned the temp up on the thermostat and the burner started up but did not finish starting up. Hooked up to the Beckett primary control and found the primary control was losing power from the aquastat intermittently causing the burner to not go through a full run cycle. Also found the aquastat display was malfunctioning. The display was constantly changing numbers when it should only change when the unit temp changes. After getting customer authorization we replaced the aquastat with a new one. Started the unit up and it turned on correctly. Ran hot water and turned the heat on to verify proper operation. Unit is working properly.
Larry H.
Inspected the on-demand water heater. Isolated and drained some water from the heater. Removed and cleaned the cold water strainer. Reconnected and opened valves. Turned the system on and had the customer turn the hot water on. The unit starts and runs properly. The unit is approximately 8 yrs old and nearing the end of life. Duct Diagnostic- 203-734-1532. Aeroseal
Andrew H.
Upon arrival customer stated they heard a grinding noise over the last roughly week and a half. Checked oil flow and nozzle and both were good. Checked the burner coupling and did not see any issues. Started the unit multiple times and did not hear or see any issues. It is possible the burner motor bearing is starting to go bad and make a noise. It is also possible the oil line was starting to gel slightly because of the cold weather recently. If the oil line begins to gel the oil pump would put more strain on the burner motor and cause it to make noise. If issue persists recommend possibly replacing the burner motor. Performed combustion test and unit is running properly
Andrew H.
Upon arrival customer stated the unit was turning off due to high temp difference between the return and supply boiler lines. Customer also stated they saw the circulator pump light flashing intermittently. When through the technician settings of the boiler and checked the last 3 faults. Checked temp sensors though the software and saw no issues. Looked up the specs on the circulator pump and found it is only supposed to draw a max of .54 amps. Checked amp draw while the pump was running and saw it was pulling .74 amps. Need to replace the circulator pump. After getting g customer authorization we removed the old circulator pump and installed a new one. Purged air from the system and started and tested the unit. Boiler pressure when leaving was 15psi. Unit is working properly
Larry H.
Turned the heat on when arrived. The burner started and the fuel pump started to whine. The oil tank is outside in the garage. Checked the oil filter and found that it was very dirty. Replaced the oil filter and the burner was running correctly. Recommend having the system serviced.
Andrew H.
Upon arrival unit was on and running. Customer stated the last couple of weeks the thermostat was turned up but the heat never satisfied to what it was calling for. Turned both thermostats up and the unit and zone valves worked properly. Put pipe clamps on the return and supply heating lines. Coming out of the unit when running was 180* F and water coming back to the unit was 150-170* F showing the unit is heating up the water and hot water is circulating throughout the heating pipes. Unit turned back on each time aquastat called for heat when return water hit 160*F. The unit is having a hard time overcoming the temps outside due to the extreme cold. Customer stated they noticed the issue when temps began to regularly were below 32*. Unit is working properly.
Dyllan M.
Heating System Repair: Arrived on-site to troubleshoot a furnace that was failing to produce consistent heat. Inspected the burners, heat exchanger, blower assembly, ignition system, and safety controls. Diagnosed a faulty flame sensor and a failing inducer motor causing intermittent operation. Replaced the flame sensor, repaired the inducer motor connection, and tested multiple heating cycles. Verified proper airflow, stable ignition, and consistent heat output throughout the home.
Larry H.
Heating Repair: Dispatched to a home reporting cold spots in several rooms. Inspected the blower motor, ductwork, dampers, and airflow. Found a partially blocked duct and a failing blower motor. Replaced the motor, cleaned and sealed ductwork, and adjusted dampers for optimal airflow. Tested heating performance throughout the home, confirming even temperature distribution and improved comfort.
Jonathan L.
Water Heater Repair: Dispatched to troubleshoot a gas water heater that was failing to produce hot water. Checked gas supply, pilot assembly, burner operation, and temperature control settings. Found a faulty gas control valve preventing proper ignition. Replaced the valve, flushed the unit to remove sediment buildup, and tested water temperature at multiple fixtures to ensure safe and consistent hot water delivery.
Larry H.
Customer turned the switch on and the burner started. Checked the fuel flow which is ok. While checking the system, the circulator for the main house was making a lot of noise. The water feed was adding water but the pressure was not increasing. Had the customer check the radiators. While adding water the system, found 2 pipes that froze and split. The pipes need to be repaired and the system purged. Repaired five areas that burst. Start a fill system. There is one area above a hard ceiling that is leaking very bad. The ceiling has to be taken down to finish repairing the leaks.
Dyllan M.
Heating Repair: Arrived on-site to diagnose a furnace that was not producing heat. Verified thermostat operation and confirmed a call for heat. Inspected the ignition system, gas valve, flame sensor, and safety controls. Identified a failed hot surface igniter and replaced it. Tested the furnace through multiple heating cycles to confirm proper ignition, flame stability, and reliable heat delivery.
Jonathan L.
Furnace Maintenance: Arrived on-site to perform scheduled winter maintenance on a residential furnace. Inspected burners, flame sensor, heat exchanger, inducer motor, blower assembly, and all electrical connections. Cleaned internal components, replaced the air filter, tested safety controls, and confirmed proper ignition and flame stability. Performed multiple heating cycles to verify consistent heat output and safe operation throughout the home.
Larry H.
Checked the burner, the oil was coming from the nozzle line flare on the burner side. Found a crack starting on the flare. Replaced the nozzle line and cleaned inside the burner assembly. Started and checked for any other leaks. System is operating properly.
Andrew H.
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 7.6%o2 5ppm co 0 smoke
Larry H.
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. 5.3% o2, 35 ppm, 83.6% efficient System is operating properly.
Andrew H.
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.
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.
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.
Larry H.
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.
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.
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.
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.
