COVID-19 Announcement to Customers
Now Hiring! Apply Today
financing about us contact chat now

Heating Cooling Services Hamden CT

Welcome, Hamden Homeowners!

Living in Hamden means humid summers, brisk winters, and four full seasons of New England weather. From older homes near Sleeping Giant State Park to student rentals around Quinnipiac University, every property needs reliable climate control. That’s exactly what our family‑ and veteran‑owned team delivers: honest advice, high‑quality Trane systems, and prompt EPA‑certified service that keeps you comfortable year‑round.


Why Choose X‑Treme Temp?

  • Local expertise – decades of experience in New Haven County climates
  • Full‑service pros – residential and commercial HVAC, water heaters & ductwork
  • Transparent pricing & financing – flexible options for every budget
  • Top‑rated technicians – BBB A+ rating, background‑checked, highly reviewed
  • Community focused – we volunteer with local charities and Hamden outreach events

Cooling Solutions for Hamden Summers

  • AC Repair – 24/7 emergency response when your air conditioner quits on a muggy July night

  • AC Maintenance – seasonal tune‑ups that shave energy bills and help prevent breakdowns

  • AC Replacement & Installation – high‑efficiency Trane or heat‑pump upgrades sized to your home

Whether you’re hosting a backyard cookout in Spring Glen or running a storefront on Dixwell Avenue, our cooling specialists keep indoor temps steady and costs low.

Reliable Heating When the Temperature Drops

From first frost through Nor’easters, we make sure every Hamden household stays warm and worry‑free.

Ductwork & Indoor Air Quality

Poorly sized or leaky ducts force your system to work overtime. Our HVAC design team offers:

  • Custom duct fabrication & sealing

  • Whole‑home air purification & zoning

Breathe easier and enjoy balanced temperatures in every room.

Water Heater Expertise

Need hot water for an early start at Hamden High or a post‑hike shower? We install, repair, and maintain:

Ask about same‑day replacement and free equipment‑sizing consultations.

Preventive Maintenance Plans

Join our Comfort Club for priority scheduling, discounted repairs, and annual performance tune‑ups. Regular service extends equipment life and helps catch small issues before they become costly emergencies.

Proud to Serve Every Corner of Hamden

We’re minutes away from neighborhoods like Whitneyville, Hamden Plains, Mount Carmel, and West Woods. If you’re in zip codes 06514, 06517, or 06518, an X‑Treme Temp technician is always nearby.

Hear From Your Neighbors

“The team fixed our furnace the same day and explained everything in plain English. Five stars!” – J. M., Whitneyville

“Super courteous, cleaned up after the install, and our new AC is whisper‑quiet.” – L. R., Spring Glen

Check out more five‑star reviews from Hamden residents on our Google profile.

Ready for Comfort You Can Feel?

Call 203-815-6851 or tap Request Service to book your appointment today. Prefer texting? Send us a message and we’ll respond within minutes. X‑Treme Temp Heating & Cooling is here to keep Hamden comfortable—season after season.


Looking for service outside Hamden? Explore our nearby pages for North Haven, Wallingford, and Cheshire to see how we can help throughout New Haven County.

Local Reviews
for Hamden, CT

X-Treme Temp Heating & Cooling, LLC Rated 4.9 out of 5 stars based on 14 customer reviews


Map of Hamden, CT 06517

Excellent service!




Review of X-Treme Temp Heating & Cooling, LLC

Andrew arrived on time and was courteous and thorough in explaining the work that was needed on our a/c unit. The a/c is working much better now thanks to his fix!

HamdenCT06517 41.36-72.9025

Map of Hamden, CT 06517

Quality service




Review of X-Treme Temp Heating & Cooling, LLC

The service by X-Treme is always performed professionally and done properly.

HamdenCT06517 41.3625-72.905

Map of Hamden, CT 06518

Great service




Review of X-Treme Temp Heating & Cooling, LLC

Good job, prompt and informed.

HamdenCT06518 41.44-72.9275

Response from X-Treme Temp Heating & Cooling, LLC:

We are so grateful for your 5-star review. Thanks for sharing your rating with us and the community.


Map of Hamden, CT 06518

Good service




Review of X-Treme Temp Heating & Cooling, LLC

All good. Thks

HamdenCT06518 41.44-72.9275

Map of Hamden, CT 06518

Very Professional Service!




Review of X-Treme Temp Heating & Cooling, LLC

Very reliable and knowledgeable staff

HamdenCT06518 41.43-72.93

Map of Hamden, CT 06518

Great service




Review of X-Treme Temp Heating & Cooling, LLC

Andrew was a wonderful young man. He was most courteous and very helpful in explaining what was needed to be done on the boiler.

HamdenCT06518 41.395-72.9075

Map of Hamden, CT 06518

Great Service




Review of X-Treme Temp Heating & Cooling, LLC

Courteous, on time, efficient , professional

HamdenCT06518 41.44-72.9275

Map of Hamden, CT 06518

excellent service!!




Review of X-Treme Temp Heating & Cooling, LLC

HamdenCT06518 41.43-72.93

Map of Hamden, CT 06518

Excellent and prompt




Review of X-Treme Temp Heating & Cooling, LLC

Courteous technician fixed our unit quickly. Great price.

HamdenCT06518 41.415-72.94

Map of Hamden, CT 06517

Very professional service




Review of X-Treme Temp Heating & Cooling, LLC

HamdenCT06517 41.3625-72.905

Good




Review of X-Treme Temp Heating & Cooling, LLC

HamdenCT06518 41.425-72.9075

Awesome service




Review of X-Treme Temp Heating & Cooling, LLC

The technician was friendly and professional answered all my questions. The answering personal working the phones are also wonderful. Would highly recommend

HamdenCT06517 41.3475-72.92

Great service




Review of X-Treme Temp Heating & Cooling, LLC

Andrew was very nice , respectable and polite polite.

HamdenCT06514 41.355-72.94

Andrew H.

Andrew H.

Upon arrival unit was on but not running. Checked the thermostat and it was turned up and calling for heat. Went downstairs and saw the furnace was not running and the furnace doors were ajar. Removed the top and bottom panels and put the bottom panel on again. Once we adjusted the door the furnace turned on with no issues. The furnace blower door was not fully pressing in on the door switch and was not letting the furnace turn on. Watched the system cycle on and off 5 times. Unit is working properly. Took pictures and measurements for a media filter box. Current filter is 16x25x1

Near Brooksvale Ave, Hamden, CT 06518
Larry H.

Larry H.

The water heater was off on reset. Reset the control and it started properly, when the furnace turned on, the water heater was loosing oil flow and shutting off. Blew out the oil line going to the u der ground tank. Primed the oil line. Turned the furnace on then the water heater, the water heater was reading 420 ohms and staying steady for 8 minutes while the furnace was on. System is operating properly.

Near Cherry Hill Rd, Hamden, CT 06514
Larry H.

Larry H.

Burner was off on reset. Reset the control and it started. Checked the ohms, the cad cell was reading 1300 ohms which will cause it to go off on reset. Adjusted the cadcell eye and it was reading 540 ohms. Installed a used Beckett primary control to see history and ohms. While the water heater was running, the furnace turned on and 10 seconds later the water heater went off on reset. Replaced the oil filter at the wall. Started and checked operation. It was still doing the same thing. After the furnace was satisfied, checked the oil flow at the water heater and noticed a little bit of air. The oil tank is under ground and can not see the level. The customer had 100 gals added on Dec 9. Recommend having another delivery due to issue.

Near Cherry Hill Rd, Hamden, CT 06514
Andrew H.

Andrew H.

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 a small amount of water and rust inside the oil filter canister. Recommend getting oil sludge additive to remove any water and sludge buildup. Customer has a space guard 2200 air filter and wants one for ac maintenance

Near W Shepard Ave, Hamden, CT 06514
Larry H.

Larry H.

The burner was off on reset when arrived. Reset the control and it started. Checked the oil flow with the water heater on and also with the furnace. Checked the oil filter at the wall, filter is ok. Removed the nozzle assembly and found the nozzle is bad. Replaced the nozzle, started and tested.

Near Cherry Hill Rd, Hamden, CT 06514
Larry H.

Larry H.

Checked both furnaces and thermostats there was no codes on either furnace. Started and tested both several times and they started properly. Checked the program on both thermostats. The 1st fl was set to - less than 90% when it is a 90% 2 stage furnace. Changed the setting to more than 90%. The 2nd fl was set to single stage heat, the furnace is a 2 stage 90% furnace. With the very cold weather early in the morning, the 2nd floor was not keeping up and the cold air was falling down to the 1st floor. The thermostat downstairs was also reading 14% humidity which will make the room feel cold. Recommend installing a humidifier.

Near Spring Glen Terrace, Hamden, CT 06517
Larry H.

Larry H.

Boiler Installation: The property’s aging boiler struggled to maintain consistent pressure and often required manual resets. After determining the system was inefficient and beyond economical repair, I installed a modern, high-efficiency boiler. I updated the zone valves, optimized the circulation pump, checked combustion levels, and confirmed stable heating across all zones.

Near Lexington St, Hamden, CT 06514
Andrew H.

Andrew H.

Autumn HVAC Maintenance: Arrived at the client’s home to perform seasonal autumn furnace maintenance. Inspected and cleaned the burner assembly, heat exchanger, and blower compartment, replaced the air filter, and verified proper thermostat operation. Checked all electrical connections, safety switches, and ignition components to ensure reliable performance for the upcoming cold season. Tested the furnace to confirm strong, consistent heat output. The system is now clean, working efficiently, and ready for winter operation.

Near Hearn Ln, Hamden, CT 06514
Andrew H.

Andrew H.

Upon arrival unit was on and running. Found oil dripping from the burner. Took the oil pump and oil burner motor off of the burner and cleaned all oil. Removed the nozzle assembly from the blast tube and found oil dripping from the nozzle and oil in the blast tube. Found a large amount of oil covering the nozzle assembly. Inspected oil pump shaft and seal and found a small amount of oil residue but did not see any noticeable leak from there. Inspected the oil line and did not see any leaks. With the burner not leaking a large amount of oil while running it is difficult to pinpoint exactly where the oil is leaking from. After getting customer authorization we went and got a used nozzle assembly to put in and eliminate that as a possible source of the oil leak. Returned to the house and put a new nozzle in and the used assembly and cycled the unit on and off multiple times. After running the unit for a few cycles we found the oil leaking was slightly less than what was happening with the

Near Tanglewood Dr S, Hamden, CT 06518
Larry H.

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. 6.1% o2, 26 ppm, 80.6% efficient System is operating properly. Purged all zones of air.

Near Tanglewood Dr S, Hamden, CT 06518
Andrew H.

Andrew H.

Performed heating maintenance on hydro air handler and gas water heater Brushed and vacuumed burner for the water heater Inspected and vacuumed burner, blower compartments and surrounding area Checked electrical connections and safeties Checked gas pressure Performed combustion test Flushed water heater to remove sediment Replaced air filter

Near Washington Ave, Hamden, CT 06518
Larry H.

Larry H.

Customer turned the thermostat on and the condenser just hummed. Found the capacitor was bad. Replaced the capacitor, started and checked the pressures. System is operating properly.

Near Jennifer Rd, Hamden, CT 06514
Andrew H.

Andrew H.

Upon arrival unit was off. Checked air filter and it was good. Checked condenser coil and found it was dirty. When the condenser coil is dirty it traps the heat and causes the pressure and temps of the refrigerant to act higher than they really are. Washed the condenser coil to remove the dirt buildup. Checked wiring in the condenser electrical compartment and at the compressor. Found a mouse nest in the compressor jacket. Removed the jacket and the mouse nest. Did not see any damaged or chewed up wires. Checked the condenser for any traces of Uv dye and did not find any. Started and tested the system and found the unit was slightly low on refrigerant. The manufacturer states the unit should have 11* subcooling +/- 3* and the unit was bouncing between 7-9. After getting customer authorization we added 9 oz R410A to the system bringing the subcooling up to 13.6* which is acceptable. Had a 17.5* temp difference between the supply and return before adding the refrigerant and 21* differenc

Near Goodsell Rd, Hamden, CT 06518
Larry H.

Larry H.

Performed an A/C pm on (2) systems. Blew out the drain line, replaced the air filter on the 2nd fl, 1st fl was clean. (Customer supplied) Checked and tested the condensate pump. Rinsed the condenser. Checked the electrical connections, checked the pressures and temps. On the 2nd condenser, replaced the suction side schrader due to not seating fully after checking the charge. System is operating properly.

Near Spring Glen Terrace, Hamden, CT 06517
Andrew H.

Andrew H.

Upon arrival unit was on but the thermostat was satisfied. Turned thermostat down and both indoor and outdoor units turned on. Checked the evap coil and the air filter and both were clean. Checked refrigerant levels and found the liquid pressure was very high. Found the condenser coil was very dirty. When the condenser coil is dirty it raises the refrigerant temp and pressure, also making it harder for the unit to cool properly. After getting customer authorization we chemically cleaned the condenser coil. After cleaning the coil we found the unit was slightly low on refrigerant. The manufacturer calls for a subcooling of 7* at 85* outside but the unit was only at 3* subcooling. After getting customer authorization we added 7 oz R410A to the system bringing the subcooling up to 9. Unit is working properly. Had 10* temp split when arriving and 17* split when leaving.

Near Spring Garden St, Hamden, CT 06517
Larry H.

Larry H.

The thermostat was blank. Checked the air handler, found a little bit of water in the pan which tripped the overflow switch. Reset the switch and vacuumed the water from the pan. Checked the pressures, the 2nd fl system is low on refrigerant. Added 1 lb 7 oz R-410a to the system. 59* supply air, 77* return air. System is operating properly

Near Spring Glen Terrace, Hamden, CT 06517
Larry H.

Larry H.

Performed A/C pm on (2) Ductless Heat Pump systems. Washed the filters. Checked the drains. Rinsed the condenser coils. Checked the electrical connections and safety’s. Tested both units in high heat and cooling. Small unit, heating- 122*, cooling- 57* Large unit, heating-107*, cooling-64*. With it not heating and cooling properly, it is an indication that it is low on refrigerant. Added 8oz R410a to the system. The large unit is operating properly. The blower wheel on the small unit is dirty. Recommend having the small indoor unit cleaned to help with airflow.

Near High Rock Rd, Hamden, CT 06514
Andrew H.

Andrew H.

Upon arrival unit was turned off. Customer stated the drain line was clogged and the secondary pan was filling up with water. Upon inspection we found the drain line was badly clogged. Purged the line with nitrogen and then flushed it with hot water with a small amount of evap coil cleaner chemicals. Had water pouring out outside with little to no obstruction. Vacuumed out the secondary drain pan and inspected the evap coil. Started the system and checked the refrigerant levels. Pressures were good and unit had 10* subcooling which is acceptable. Unit is working properly

Near Pearl Ave, Hamden, CT 06514
Andrew H.

Andrew H.

Performed routine maintenance on a 4-ton central AC system. Cleaned condenser coil, inspected the capacitor, flushed the drain line, and tightened electrical connections. Found compressor amperage running high, so we’ll recheck next visit. Advised client to keep landscaping trimmed around outdoor unit to prevent debris buildup and overheating. System is currently operating within normal specs.

Near Magee Dr, Hamden, CT 06514
Andrew H.

Andrew H.

Upon arrival unit was on but not running. Turned thermostat up. The unit started to light but a couple seconds after the flame came on it put the flame out. Inspected the flame sensor and found it was very corroded and starting to get thin in some places causing it to not sense the flame. Went to a supply house to get a new flame sensor. Removed the old flame sensor and installed the new one. Also found the air filter was plugged and covered in dog hair. Replaced the air filter with a company supplied one. Started and tested the unit. Unit is working properly.

Near Brooksvale Ave, Hamden, CT 06518
Larry H.

Larry H.

Installed a new Bradford White electric water heater for a homeowner. Removed the old leaking unit, installed the new tank, and connected the water supply and electrical lines. Checked the pressure relief valve, filled the tank, and tested for proper operation. Ensured the homeowner had consistent hot water before completing the job.

Near Maplecrest Ln, Hamden, CT 06514
Andrew H.

Andrew H.

Inspected interior of boiler and checked door gaskets Cleaned the condensate trap and filled it with clean water Checked all boiler piping for leaks and corrosion Checked flue pipe and air piping Checked system pressure and controls Inspected and cleaned ignition electrode Checked all boiler wiring connections and safeties Started and tested the system

Near Carmalt Rd, Hamden, CT 06517
Andrew H.

Andrew H.

Upon arrival unit was on but not running. Temp in the house was 73 and the thermostat was set to 71. Turned temp up to 76 and unit started up with no issue. Cycled unit on and off multiple times with no issues. Checked all radiators and all of them were getting hot. Compared the thermostat temp to a temp probe and found the thermostat is reading 3 degrees warmer than the indoor temp is. Most thermostats have a 3* temperature variance. The thermostat may be starting to go bad. Adjusted the hi and low limits on the boiler aquastat so the burner will run for longer periods of time. Unit is working properly.

Near Cherry Hill Rd, Hamden, CT 06514
Andrew H.

Andrew H.

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 7.8%o2 48ppm co 0 smoke When arriving unit was off on reset. Pushed reset button and furnace lit right away. Checked oil flow and had good flow. Checked the igniter and saw the spark was an orange/yellow color indicating it is getting weak. After getting customer authorization we replaced the igniter. Started and tested unit. Unit is working properly.

Near Cherry Hill Rd, Hamden, CT 06514
Andrew H.

Andrew H.

Upon arrival unit was on but not running. Ran hot water and the water heater turned on with no issue. Checked oil flow and had ok flow. Checked the nozzle and found it was dripping with oil on the end cone and in the blast tube. Replaced the nozzle and started the water heater. We found when the furnace turned on while the water heater was running the water heater would turn off. Upon further investigation we found the oil filter by the wall was starting to get dirty and restricting the oil flow. Since the furnace is closest to the filter the majority of the oil was flowing to the furnace and making the water heater turn off. Replaced the oil filter and bled the oil line. Also removed the oil filter from the filter canister by the water heater because the oil filter at the wall is rated for 2 appliances. Started and tested the water heater by itself and when the furnace was running as well. Unit is working properly.

Near Cherry Hill Rd, Hamden, CT 06514
Call X-Treme Temp 203-815-6851 or Contact Us
Request An Appointment Today
servicedetailscustomerreturningschedule
*
Details Regarding Your Request...
Contact and Service Location...
*
*
To Serve You Best...
Have we served you in the past?
Yes
No
*
What Date Is Convenient For You?
*
What time of day is best for you?
First Available
Morning
Afternoon
*
Back Next