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

Local Reviews
for north haven, ct

Rated 5.0 out of 5 stars based on 40 customer reviews

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!

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent

There’s no better than X-TREME. Had my furnace serviced/cleaned today and I can honestly say the technicians were fantastic! They did a great job and explained to me in detail when I had a question. This is my third year doing my annual furnace cleaning I had other companies in the past but they didn’t compare. So glad found X-TREME

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent Service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent Service!

Andrew was/is an amazing. He was very thoughtful, kind and very thorough in servicing my AC, water heater, and furnace. He answered every question, provided tips and tricks, and explained everything he inspected and recommended. Could not be happier with him and the service he provided.

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent Service!

Andrew was great. He was efficient, knowledgeable, and quickly solved our problem. He also was able to accommodate our last minute service call into his schedule, which we also really appreciated.

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Boiler annual service

Mr. Larry service my boiler and he did excellent job

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent service

  • Overall Experience
  • Quality
  • Price
  • Convenience

Great Service And Pricing Was Very Reasonable

Larry was very informative and explained things perfectly. I would recommend his services for heating and cooling without hesitation.

  • Overall Experience
  • Quality
  • Price
  • Convenience

Excellent!

  • Overall Experience
  • Quality
  • Price
  • Convenience

⭐️⭐️⭐️⭐️⭐️

  • Overall Experience
  • Quality
  • Price
  • Convenience

Job Locations
for north haven, ct

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.


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.


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 7.7%o2 0ppm co 0 smoke


Larry H.

Larry H. Job Checkin

The furnace was off on a roll out error code. Found the exhaust roll out tripped. Reset and the furnace started. Checked the temp at the switch, 129*f, the switch is rated for 215*f. The inducer motor is drawing 1.9 amps and rated for 1.8 amps. Performed a combustion test. Recommend replacing the rollout switch due to possibly tripping at a lower temperature and recommend replacing the inducer motor due to the higher amps which can cause the motor to overheat and slow down and possibly cause the roll out to trip.


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. 8.5% o2, 30 ppm, 0 smoke, 82.3% efficient System is operating properly. There is a couple of sections of flue pipe that are getting soft (easy to squeeze), recommend replacing them in the future. Also there was dryer lint around the boiler, recommend checking the dryer connections. There is corrosion around the bolts of the domestic water coil from a previous leak. Recommend replacing the coil gasket.


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. 5.1% o2, 34 ppm, 0 smoke, 84.4% efficient System is operating properly.


Larry H.

Larry H. Job Checkin

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. 4.8% o2, 38 ppm, 82.7% efficient System is operating properly.


Larry H.

Larry H. Job Checkin

Turned the system on, there was an error code of roll out open. Found the limit on the exhaust tripped. Reset and the inducer turned on and fired properly. Cycled several times. High winds can push the exhaust down the flue and possibly trigger it after shut down.


Larry H.

Larry H. Job Checkin

24-hour Emergency Heating Repair: Responded to a late-night emergency call after the client reported that their boiler had stopped producing heat. Arrived on-site and established safe working conditions, then inspected the boiler system to identify the issue. Found a faulty ignition module preventing the burner from firing. Replaced the defective component, tested the boiler through multiple heating cycles, and verified proper operation of all safety controls. The emergency repair was successful, and the boiler is now fully operational, restoring heat during critical hours.


Jonathan L.

Jonathan L. Job Checkin

Ductwork Repairs: Arrived at the client’s home after they reported weak airflow in several rooms. Inspected the duct system and found multiple holes and separated seams in the supply ducting, causing significant air loss. Cleaned the affected sections, sealed the holes with mastic and reinforced tape, and repaired the loose connections. Tested airflow afterward and verified strong, consistent delivery throughout the home.


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. 10.2% o2, 18 ppm, 77.7% efficient System is operating properly. While performing the maintenance, noticed that water is starting to migrate into the air side of the expansion tank. The expansion tank will need to be replaced.


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, 25 ppm, 83.9% efficient 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. 4.3% o2, 31 ppm, 86.1% efficient System is operating properly.