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Find Air conditioning pros in Randolph

Avatar for Speer Air
Speer Air
4.6(
165
)

Serving Randolph, 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 Ray's HVAC
Ray's HVAC
4.7(
252
)

Serving Randolph, 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 rate88%
133 neighbors recently requested a quote
Avatar for ABCastello's Heating and Cooling
ABCastello's Heating and Cooling
4.6(
101
)

Serving Randolph, 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 Dawson Mechanical Contracting
Dawson Mechanical Contracting
4.8(
134
)

Serving Randolph, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"Came immediately to pump out basement water.  Replaced hot water tank, furnace, and sump pump.  Also installed back-up sump pump system that works when power is out!   It works by water pressure (No, I do not know how) electric source IS NOT NEEDED.  Did not know this type of system existed.  Price was reasonable (even tho I was in a panic).   Will definitely use this company again.
"
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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 Randolph, 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%
13 neighbors recently requested a quote
Avatar for Petro Home Services
Petro Home Services
4.3(
103
)

Serving Randolph, 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."
Additional Photos
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Response time6 days
14 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for MDL Electric LLC Cooling & Heating
MDL Electric LLC Cooling & Heating
4.6(
133
)

Serving Randolph, NJ and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"MDL Electric was a great Angie's List find! My tenant's washer stopped working in the middle of a load. I also needed to have 2 breakers and 6 GFI outlets replaced. Spoke to Miguel at 1:30 this afternoon. He was able to get a technician over there in about 30 minutes. He explained all that needed to be done and, less than 3 hours later, the work was finished and everything was left neat and clean! Very prompt and professional. Now THAT’s customer service! I wouldn't hesitate to use MDL Electric again or to recommend them to friends in the future. Thank you, Miguel!"
Additional Photos
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Response time1 day
5 neighbors recently requested a quote
Recommended by93%of homeowners
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FAQs for air conditioning projects in Randolph, 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 Randolph, NJ homeowners’ guide to air conditioning services

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