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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

"I have used Speer Air for several years for HVAC preventive maintenance at my home. We recently expanded and they installed a package unit to take care of the expansion space. The work was good and they have been back for adjustments as necessary."
Residential Attic Install
Commercial Multi Unit Install
Guardian Series
Response time2 days
Response rate85%
9 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

"I highly recommend this company!!! This is someone who knows their stuff and is willing to go the extra mile to really get the job done! Our heating oil ran out while we were away and we came back to a freezing house and an odd puddle of water coming out of the heater. Thanks to Desmond, we were able to get the heater back up and running properly within a day!! Excellent customer service and very professional! I have used them before and will definitely be using them again!!!"
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 had an emergency situation in which the air condition unit was not working! My house was as hot as an oven! AAA HVAC was able to come out quickly about an hour after I called and fix the problem for minimal cost! I would definitely call them again! They are f friendly, professional, honest and very reliable! I recommend this company! Do not hesitate to call them! Thanks so much!"
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

"Wonderful. Dave kindly walked me through the reset process on the phone and did not need to come out to service the water heater. I will be calling him in the future for any needed repairs."
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+20

Response time5 hrs
6 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

"A++++ Peter is a superstar and his crews are hardworking, courteous and respectful. They moved quickly to remove an old central A/C unit and installed 4 new ecobee thermostats and explained exactly how the process would go. He is so honest and competent and with a ten year labor warranty that his company provides, you'd be crazy to go with someone else. He also was very responsive and extremely fair in pricing, timing and providing his licenses which I requested. I would and will hire him again for any Central A/C needs. He cares about his work and his customers and it really shows."
Response time1 day
Response rate86%
16 neighbors recently requested a quote
Avatar for Petro Home Services
Petro Home Services
4.3(
103
)

Serving Dover, NJ and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"There was a snag at the beginning when they realized, after beginning to dig, that the AC unit was on top of the oil tank and they'd have to call someone in to move it before digging could continue. That delayed things a few days, but thereafter they did a good job of digging and were very careful with our trees. They also took care not to ruin the lawn with the machinery. The new tank and heater were quickly put in the basement with no problems."
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Response time6 days
16 neighbors recently requested a quote
Recommended by86%of homeowners
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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.