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
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
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
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.
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 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.
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.
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.
Removed old circuit board and installed a new circuit board. Started and tested the unit. Unit is working properly.
Larry H.
Removed and installed a new Burnham IQ Board. Started and tested. System is operating properly
Larry H.
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.
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.
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.
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
