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Find Air conditioning pros in Denville

Air Temp Service Company, Inc.
4.2(
143
)

Serving Denville, NJ and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Mario was very professional and knowledgeable. He always answered any questions I had promptly and thoroughly. I had questions about sizing and seer rating for the unit and he let me know which one would best fit my situation. The crew always cleaned up after themselves and left the place like they came. They installed a new air handler and compressor in 1 day and came back to add an attic fan."
Weil Mclane bolier
 Rheem hot air furnace
 Buderus Boiler & ht wtr
 15 zone radiant heat
 Rheem A/C install

+1

Response time1 day
32 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Speer Air
Speer Air
4.6(
165
)

Serving Denville, NJ and surrounding areas

Approved

In business since 1958

Free estimates

Emergency services offered

"Excellent! The team worked diligently for 5 days to install a central air system in our old house with Plaster Walls. It was NOT easy, yet they did a fantastic job. They were able to add all ducts to the first floor with out any "chases" or enclosures requiring to be build. And almost none of our first floor lines up with our second floor closets, but they figured it out. Great time and fantastic service. Make sure you get Brandon and Sean. The work their butts off, and ensure your house stays clean (they cleaned up everything after every day - not an easy feat). Cannot say how happy am I with their work!"
Residential Attic Install
Commercial Multi Unit Install
Guardian Series
Response time2 days
Response rate100%
9 neighbors recently requested a quote
Avatar for Ray's HVAC
Ray's HVAC
4.7(
254
)

Serving Denville, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I was having a problem with my air conditioning. The thermostat was blank. I called Ray?s HVAC. They came over and identified the problem. Then they came back two days later and fixed it. Everything is working fine now. I would use them again and recommend them to people I know."
New heating system with steam humidifier
Expert equipment rigging
Packaged Trane high efficiency equipment
Emergency replacements
Piping

+1

Response time6 hrs
Response rate89%
117 neighbors recently requested a quote
Avatar for ABCastello's Heating and Cooling
ABCastello's Heating and Cooling
4.6(
101
)

Serving Denville, NJ and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Excellent and professional work. Will definitely recommend ABCastello. So happy he was able to come out the same day I needed service with my air conditioner unit. Great job! Thank you!"
Air conditioning installation
A/C compressor replacement
410A charging system
Oil-Gas conversion
Propane-Gas conversion

+24

Response time11 hrs
Recommended by95%of homeowners
Avatar for REEM AIR LLC
REEM AIR LLC
5.0(
21
)

Serving Denville, NJ and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Moe and his crew were very knowledgeable and did great work. I will recommend Reem Air to anyone I know who is looking for Heating and Air Conditioning."
Commercial Install
Commercial Install
Commercial Install
Commercial Install
Commercial Install

+4

Response time2 hrs
Response rate89%
Recommended by100%of homeowners
Avatar for Dawson Mechanical Contracting
Dawson Mechanical Contracting
4.8(
135
)

Serving Denville, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"After getting four or five quotes, from recommendations and Angie's list, we chose Dawson Mechanical to install two new furnaces.  The crew arrived on time and got the first furnace working by the end of the first day and the house warmed up.  The second furnace was completed the second day.  However, the crew forgot to relight the hot water heater.  Dave came back that evening to take care of this small issue.  We would definately use this company again."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time7 hrs
Response rate99%
10 neighbors recently requested a quote
Dun Rite Heating and Cooling
4.5(
112
)

Serving Denville, NJ and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"Peter and his crew were great. We replaced our steam heat and window AC units with their LG high-efficiency dual zone (heat and AC) unit. The air is great. The system adds moisture so it is not the DRY air that is typical of electric units. They showed up on time for the work each day. They were ALL very polite, clean, well spoken and knowledgeable. It is rare to be able to say that about ALL of the workers. We have an OLD home, and they worked around every obstacle that was in their way without tearing apart walls, floors, and ceilings like other companies admitted they would indeed have to do. Peter will take the time to explain anything you have questions about, so do not hesitate to ask. My wife and I had many questions and felt much better after asking them. They work with you and have the mentality that it is YOUR house so it should make YOU happy. They are not done after they get paid, they work with you to make sure everything is to your liking even after it is up and running. Oh, and it will NOT cost you more than the competition. In fact, it is just the opposite. So glad we went with them!"
Response time1 day
Response rate100%
19 neighbors recently requested a quote
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FAQs for air conditioning projects in Denville, NJ

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Denville, NJ homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.