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
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
Outstanding and Professional Service!
Tracy - Wallingford, CT 06492
Another great experience. Always displays a customer first attitude. Friendly, informative and makes recommendations as needed. Tells it like it is, what service you need and when it should be scheduled. We use Xtreme for multiple services and they have never let us down. Outstanding job! Highly recommend.
Excellent service
Colleen - Wallingford, CT 06492
Excellent Service
Bob - Wallingford, CT 06492
Excellent Service!
Doll - Wallingford, CT 06492
We have been using X-treme Temp Heating and Cooling since purchasing our home in 2019. They have never failed to provide prompt, friendly service. Working with them is the closest you can get to having “family in the business” as they do, indeed, treat you like family. Would highly recommend!
Excellent
Robert - Wallingford, CT 06492
Excellent Service!
Lagase - Wallingford, CT 06492
Always a pleasure with the tech!
Excellent
Lisa - Wallingford, CT 06492
Andrew seems so knowledgeable in everything he has done for me and explains everything. He is also very kind and seems to take pleasure in making things easier for me.I am very comfortable placing my trust in your company to do the right thing by me. It’s been a very difficult couple of years since Gary died and as you know I have had to take on everything myself. I am getting educated in many things thanks to you. Keep doing what you are doing.
Excellent Service
Rachel - Wallingford, CT 06492
Always receive excellent service. Office staff is always helpful and courteous.
Excellent Service!
susan - Wallingford, CT 06492
Andrew fixed an ongoing problem we had with extreme hot water for years!
Excellent!
Sue - Wallingford, CT 06492
Our second year with you and we will continue to use your services!
Larry H.
Picked up part. Installed the new circuit board. Started and tested several times. The furnace operates properly and inducer shuts off at the end of each cycle.
Andrew H.
Shut oil valve off at the burner. Disconnected the flexible oil lines for the burner and the incoming oil line for the tigerloop. Removed old tigerloop and installed the new tigerloop with new flared fittings and oil valve. Reconnected the flexible oil lines and the incoming oil line for the tigerloop. Started the burner up and bled the air from the oil tank to the oil burner. Started the unit and watched it turn on and off 5 times to ensure proper operation and no air was getting to the oil burner. Unit is working properly.
Andrew H.
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 8.2%o2 0ppm co 0 smoke While performing the maintenance the customer stated they had heard some air in the heating pipes. After getting customer authorization we bled both zones of any air. Started the unit up and tested the heat for both zones. Had hot water coming back to both returns. When leaving boiler pressure was at 15psi
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. 6.5% o2, 29 ppm, 0 smoke, 82.7% efficient System is operating properly.
Larry H.
Performed a heating pm on an oil steam boiler. Brushed and vacuumed. Replaced the oil filter, nozzle and strainer. Started and checked the safeties. Performed a combustion test. 6.9% o2, 27 ppm, 0 smoke, 81.0% efficient System is operating properly.
Larry H.
When arrived, the pilot was out. Removed and cleaned the thermocouple and tried, it did not light. Replaced the thermocouple, started and tested. System is operating properly.
Andrew H.
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.
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.
Andrew H.
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.
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.
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.
Larry H.
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.
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.
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.
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.
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.
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.
The thermostat is not turning on in heat. Checked the batteries in the thermostat for the entry way. There was 24 volts. Jumped R-W wires and the circulator turned on. The thermostat is bad. Replaced the thermostat. Started and tested, the zone is heating correctly.
Larry H.
When arrived, there was water on the floor at the pressure relief valve. The boiler pressure was at 20 psi, checked the extrol tank and found water was migrating past the diaphragm into the water side which will increase the pressure while it is running. The extrol tank needs to be replaced. Drained the pressure from the system and replaced the extrol tank. Filled and started. Bled all the radiators. System is operating properly.
Larry H.
Thermostat Installation: The homeowner wanted better scheduling and energy management. I removed their outdated thermostat, installed a new programmable model compatible with their system, verified proper wiring and voltage, configured custom heating and cooling presets, and educated the homeowner on using the scheduling features for maximum comfort and efficiency.
Jonathan L.
Furnace Replacement: The homeowner’s furnace began shutting down unexpectedly and producing uneven heat throughout the home. After a full diagnostic, I discovered the blower motor had seized and the control board showed signs of electrical damage, making repairs unreliable and costly. I recommended upgrading to a high-efficiency replacement. I installed the new furnace, updated the venting to PVC, added a modern thermostat, and confirmed the system delivered stronger, more consistent heating with improved energy efficiency.
Dyllan M.
Commercial Heating System Replacement: A commercial client faced constant heating downtime and escalating energy bills due to an outdated rooftop unit. I performed an assessment, recommended a high-efficiency commercial replacement, coordinated the crane lift for rooftop installation, upgraded control wiring, and fully tested heating output. The business now benefits from reliable performance and reduced operating costs.
Jonathan L.
Water Heater Install: The client’s existing water heater had begun leaking heavily from the internal tank, causing early signs of floor damage. I removed the compromised unit, installed a new high-efficiency water heater with upgraded shutoff valves, secured all venting and water connections, and verified strong, consistent hot water recovery rates throughout the home.
Dyllan M.
Furnace Repair: A homeowner reported loud clicking sounds followed by the furnace failing to ignite. During my inspection, I traced the issue to a sticking flame sensor coated with heavy carbon buildup. I cleaned the sensor, checked ignition timing, adjusted the burner assembly, and confirmed the system cycled smoothly, restoring dependable heat.
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 While performing the maintenance we found the nozzle was very dirty and was dripping inside the blast tube. Also found the blast tube end cone is developing a crack and the end of the blast tube is starting to corrode slightly. Brought the customer down and showed them the corrosion. Customer would like a price on a new burner since the primary control, burner motor, and oil pump are all from the old water heater. Both the nozzle and the cracked end cone will cause the water heater to run dirtier than normal and will cause extra soot and can cause an oil/soot smell. Also found the shark bite fitting going into the water heater is beginning to leak. Took pictures for a repair quote.
