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Find Air conditioning pros in Dover

Avatar for MSD Heating & Cooling
MSD Heating & Cooling
4.9(
74
)

Serving Dover, NJ and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Ali came over to our home when we called with a concern of the air flow in our central air conditioning system. He checked the return, the air flow, the temperature at all of the vents, and the entire system. It had more to do with the age of the system and gave us suggestions on how a different filter could increase the air flow. He did all of this and refused to take any money for his time. He is a true honest professional and someone that we would recommend to everyone."
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+1

2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Speer Air
Speer Air
4.6(
165
)

Serving Dover, 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 rate85%
9 neighbors recently requested a quote
Avatar for Ray's HVAC
Ray's HVAC
4.7(
253
)

Serving Dover, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Ray's HVAC responded quickly to my request to repair my furnace, which could not start this year. They were able to find and fix the real cause of the issue - a bird net in the PVC pipe which blocked the air flow, and made my furnace is working again!"
New heating system with steam humidifier
Expert equipment rigging
Packaged Trane high efficiency equipment
Emergency replacements
Piping

+1

Response time6 hrs
Response rate88%
114 neighbors recently requested a quote
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.6(
68
)

Serving Dover, NJ and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"I was very happy with my service call today! The repairman, Scott, was knowledgeable and pleasant and wore a mask and gloves throughout., so I felt safe, despite the pandemic. He serviced both of my central air systems and diagnosed the problem with the malfunctioning one and fixed it. By the time he left my house was already a much more pleasant place to be!"
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+13

Response time3 days
12 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for ABCastello's Heating and Cooling
ABCastello's Heating and Cooling
4.6(
101
)

Serving Dover, 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 AAA HVAC, LLC
AAA HVAC, LLC
4.7(
189
)

Serving Dover, NJ and surrounding areas

Approved

In business since 2000

Emergency services offered

Warranties offered

"I have never written a review but today it was a MUST. This morning my A.C. was not working I messaged AAA HVAC and within minutes a gentleman "JOE" called me. I explained my air conditioner was not working and with 1/2 hour a young man named "Jay" was he. He was polite, courteous and explained everything to me. NOT ONLY IS THIS COPANY OUTSTANDING BUT, ANYONE LIVING IN THE TRI STATE ARE LOOK NO FURTHER THAN "AAA HVAC FOR EXCELLANT WORK AND TOTALLY PROFESSIONAL. DO NOT HESITATE TO ALL THEM.!!!!!!!! THEY ARE AMAZING. "JOE, AGAIN THANK YOU FOR ALL YOUR HELP, AND TRULY YOU WERE SENT DOWN FROM HEAVEN. !!!!!!!! STAY SAFE AND PRAYERS ARE WITH YOU ALL. AGAIN THANK YOU......"
New installation of mini split units
Rooftop unit
Jay our Technician
Raheem Condensing units
Our trucks at the job site

+12

Response time2 hrs
Response rate88%
11 neighbors recently requested a quote
Avatar for Dawson Mechanical Contracting
Dawson Mechanical Contracting
4.8(
134
)

Serving Dover, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

We are a BPI Building Performance Institute Accredted Plumbing and HVAC company, We are licensed plumbers and I am a certified plumbing instructor and fire inspector I also have 2 Backflow testing certifiactions. We do the highest quality residential and commercial work with my highly trained staff. I am the past president of the N.J. State league of Master plumbers for 2010-2011

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+20

Response time5 hrs
9 neighbors recently requested a quote
Recommended by94%of homeowners
Dun Rite Heating and Cooling
4.5(
112
)

Serving Dover, 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 rate86%
17 neighbors recently requested a quote
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FAQs for air conditioning projects in Dover, 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 Dover, NJ homeowners’ guide to air conditioning services

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