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
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!
Boiler Maintenance
JohnG - Wallingford, CT 06492
Larry and his son Andrew provided outstanding service! Prompt and communicative! Xtreme is our go to service provider!
Fast and Excellent Service Repair!
Stephanie - Wallingford, CT 06492
Andrew and his colleague were here on time and completed the repair within 30 minutes!
Another great Service!
Jeff - Wallingford, CT 06492
Andrew has serviced our heating unit the past two years and has been great. Very good service and I hope he is back to our house next year.
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.
Larry H.
Checked system. The boiler is operating properly with the burner turning on and off according to the zones. There are (4) zones and a storage tank that is feed from the coil. When the burner turned on, there was a rumble. Checked the oil flow and transformer. Both were ok. Removed the nozzle assembly and the was a dark spot on the tip of the nozzle indicating that it was not spraying correctly. Replaced the nozzle and system is operating properly. Cycled the burner several times.
Andrew H.
Upon arrival added sludge additive to the oil fill pipe for one oil tank. Went inside and removed a plug from the second oil tank and added the sludge additive to the second tank. Put the plug back in the second oil tank. Replaced both oil filters and found the one for the first tank was very dirty and was starting to restrict oil flow coming out of the tank. Bled the oil line leading to the burner and had clean and consistent oil flow coming out.
Andrew H.
Installed a 47-Gallon Short Electric Hot Water Heater in the crawl space. Capped the water coil lines and routed the piping to the new water heater. Filled the water heater with water and checked all piping and fittings for leaks. Purged air out of the water heater. 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 9.5%o2 0ppm co 0 smoke
Larry H.
Checked the temps at the boiler and at a bathroom downstairs. Coming out of the boiler going into the mixing valve was 137-140 with the aquastat reading 146*. The temp at the sink dropped to 97*, closed and opened the mixing valve several times. After opening the valve, the temp increased on the mixing side to 124* and 117* at the sink. If this continues, recommend replacing the mixing valve.
Larry H.
Checked the thermostat and zone valves. The thermostat is reading correctly, the fan switch was in the “ON” position, causing constant circulation through out that section of the house. The temperature before the valves was 84*, after all three valves was between 74-78*. The valves are working correctly. The system is operating properly, the kitchen side was warmer due to the fan.
Andrew H.
Performed pm on gas furnace and gas space heater Brushed and vacuumed burner tubes Inspected and vacuumed burner, blower compartments and surrounding area Checked electrical connections and safeties Checked gas pressure Performed combustion test Furnace Inlet pressure-12.46 in.w.c. Manifold pressure-3.313 in.w.c. Unit heater Inlet pressure- 12.25 in.w.c. Manifold pressure- 3.385 in.w.c. While performing the maintenance we found the inlet gas pressures were higher than the manufacturer recommends. The max inlet pressure is supposed to be less than 12 in.w.c. Recommend having the gas company come out and adjust the gas meter pressure slightly.
Larry H.
Performed a heating pm on a gas furnace. Cleaned the flame sensor, checked the gas pressures 7.1”wc incoming, 1.5”wc low fire/ 3.0”wc hi fire. Replaced the air filter- customer supplied. Started and checked the safeties. Performed a combustion test. System is operating properly.
Jonathan L.
AC Repair: Arrived at the client’s home after they reported higher than normal energy bills and decreased cooling performance. Inspected the air conditioning system and found the condenser coil partially blocked and the refrigerant slightly low, causing the system to work harder than normal. Cleaned the condenser coil, checked all electrical connections, and topped off refrigerant to proper levels. Tested the system for correct operation, airflow, and temperature output. The system is now running efficiently, and cooling costs should return to normal.
Larry H.
Furnace Maintenance: Arrived at the client’s home to perform routine furnace maintenance. Inspected and cleaned the burner assembly, blower compartment, and heat exchanger, and replaced the air filter. Checked all electrical connections, safety switches, and the ignition system to ensure reliable operation. Verified proper airflow and tested the furnace through a full heating cycle. The system is now clean, working efficiently, and ready for dependable performance throughout the season.
Dyllan M.
Furnace Repair: Arrived at the client’s home after they reported the furnace was not heating the space. Performed a full diagnostic and found the system shutting down due to a failed ignition component. Replaced the faulty ignitor, reset the furnace, and verified proper ignition sequence and burner operation. Monitored the system through several heating cycles to ensure consistent performance. The furnace is now heating normally and operating safely for our valued client.
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 4.6%o2 0ppm co 0 smoke
Larry H.
Performed a heating preventative maintenance service 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. There are 3 Hi-vents near the air scoop that have corrosion on them from a previous leak. Recommend replacing them.
