Top-rated air conditioning pros.

Get matched with top air conditioning pros in Denville, NJ

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

"After I posted my initial reviews, the owners of Air Temp Service Co. (Mario and Lori) reached out to me, and wanted to make it right. They are a family owned business, and proud of the work they do.We talked about the issues with our interactions with their company. After some additional research, I agree that the Nest Thermostat does need a common wire, and its beneficial that we had it installed. The other issues were due to the technician that was working with us at that time. That technician was removed from the company a few weeks after the work at my house was complete. The technician was responsible for the up charge on service, and pushing us to replace the CPU for our central AC (this should have been communicated as being the worst case scenario instead of the first step to fix the issue).The outside unit which was the main job I contracted Air Temp Service Co. for was installed cleanly and quickly. It was good work. They have also removed the technician who caused my family so much grief. I would say if you are a potential new customer they are worth giving a shot. They will take care of the job, and if you do have an issue they will make it right."
Weil Mclane bolier
 Rheem hot air furnace
 Buderus Boiler & ht wtr
 15 zone radiant heat
 Rheem A/C install

+1

Response time2 days
15 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for A&C Quality Air, LLC
A&C Quality Air, LLC
4.3(
157
)

Serving Denville, NJ and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"I recommend the professionals from A&C Quality Air. Thy responded immediately to my air conditioning problem. Work was explained in detail and all my questions were answered. Ceasar and his crew were meticulous in completing the task. They spent many hours trouble shooting and replacing the damaged unit. The price was reasonable to say the least!"
A/C
A/C
A/C
A/C
A/C

+26

23 neighbors recently requested a quote
Recommended by92%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

"Speer Air is a great company, from customer support, to electricians, plumbers and sales rep., our guy was Anthony DeFranco, he was fantastic, got all the permits, setup the inspections, gave us a really fair price and just was all out great working with. Very smooth from start to finish with all personnel involved."
Residential Attic Install
Commercial Multi Unit Install
Guardian Series
9 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Ray's HVAC
Ray's HVAC
4.7(
253
)

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 time4 hrs
112 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for AC & Heat by Kyle
AC & Heat by Kyle
4.9(
114
)

Serving Denville, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Emergency services offered

Warranties offered

"AC & Heat by Kyle provided a very thorough service call on an old boiler. The service provider walked me through the condition of my boiler using pictures and data, and what my options were for service or replacement. Would highly recommend this professional."
Canister
Steam Humidifier
Maintenance FOR ALL!!!
Maintenance FOR ALL!!!
Maintenance FOR ALL!!!

+22

Response time6 hrs
1 neighbors recently requested a quote
Recommended by97%of homeowners
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

"ABC Castellos Heating & Cooling came when they said they would and took the time to explain to me the Homeowner, what they were going to do. They also performed a AC System check which they did as part of their service. They also took the time to ask questions about my system. Desmond was very professional. i would recommend them to any one who needs their service."
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 time1 hour
Response rate85%
Recommended by100%of homeowners
Avatar for Dawson Mechanical Contracting
Dawson Mechanical Contracting
4.8(
134
)

Serving Denville, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"My wife and I moved into our home about two years ago and inherited a very old hot water heater (12+ years old) and boiler (25+ years old).  They were working fine, but they were on their last legs and could go at any time.  More importantly, 2 of the 3 upstairs bedrooms were always cold, little heat reached those rooms through the baseboard radiators, and we wanted to see what could be done to get it fixed.  This was very important to us since one of those rooms was going to be used as a nursery the following month.
I spoke to Dave on the phone who set up an appointment for the next day to investigate.  He assessed the water heater and boiler, letting me know that they were currently working fine, explained how it worked, and that the boiler was missing a safety feature that is now required in newly installed boilers (I think it was something like an expansion tank?).  He explained it very well, I could tell he knew what he was talking about.  To solve the cold bedrooms riddle, Dave walked around the basement, looking at the exposed pipes and where they were headed.  Then he went to the rooms on the first floor, noting the locations of the radiators.  Finally he went to the 2nd floor to see where the rooms were and the radiator locations.  He found that the rooms were connected just fine, but that they were on the end of a long loop of rooms being heated.  The 2 bedrooms were located on the same zone as the entire first floor, and as a result, were not being heated effectively.  In addition, the thermostat was on the first floor, meaning once the desired temperature was reached on the first floor, the system shut down, leaving the 2nd floor in the cold.  To fix, he recommended adding a third zone by reconnecting the 2nd floor pipes in the basement directly to the boiler and connecting a new 2nd floor thermostat to the boiler so that it would continue working until the 2nd floor rooms were warm.
It should be pointed out that the original intent of my service call was not to get a new boiler, but to fix the heating problem on my 2nd floor.  The 3rd zone solution complicated things with my older boiler, which would have had to be retrofitted with a bigger opening to accommodate the 3 zones.  Dave advised that rather than spending money on those enhancements, which would go to waste if and when my boiler dies, that I may have wanted to consider getting a new boiler.
My wife and I agreed to the work and we scheduled an appointment a few weeks later to get the work completed.  On Day 1, they replaced the water heater and did some work on the 2nd floor piping in the basement.  On Day 2, they replaced the boiler and connected all 3 zones, including the new 3rd zone.  The crew was excellent, putting down drop cloths around the house where they were walking around to drain the radiators and cleaning up behind them.  When the work was completed, Dave walked me around and showed me what they did and gave me a tutorial of how the new thermostat worked.  Everything worked perfectly and the upstairs bedrooms are now nice and warm!
Dave came back a few days later and dropped off the invoice, warranty, and completed rebate details (all I had to do was fill in my address and mail it out).  He also asked how things were going and answered some questions for me, including how I could adjust temperatures in the room using the radiators.
All in all, I think I got my money's worth and would recommend Dawson to my friends and family for any heating work.
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

10 neighbors recently requested a quote
Recommended by94%of homeowners
...
Showing 1-10 of 454

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.