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Find Air conditioning pros in Dhs

Avatar for BlueStar Air Mechanical Inc.
BlueStar Air Mechanical Inc.
4.9(
32
)

Serving Dhs, MD and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"I contacted Bluestar Air Mechanical for a second opinion after an appointment with Air One. I have a Carrier HVAC system, and the Air One technician recommended a complete system replacement, claiming the blower was bad, the furnace control board needed replacing, and that there were other issues. Since replacing the HVAC is a big investment, I wanted to get a second opinion. It was only after comparing the service from Bluestar that I realized Air One may have been pushing for a new system sale or lacked the expertise to properly diagnose and repair the actual problems. Isaac, the technician from Bluestar, spent about an hour thoroughly diagnosing and fixing the issues. He found burnt wiring in the furnace and discovered that the wrong capacitor had been incorrectly installed in the AC. Isaac replaced the burnt wiring in the furnace and the capacitor in the AC. After these repairs, my Carrier system was back up and running—without the need for a costly replacement. Bluestar, and Isaac in particular, demonstrated professionalism, expertise, and honesty. They focused on resolving the actual issues instead of pushing for an unnecessary system replacement. I highly recommend Bluestar for their reliable service and Isaac’s thorough and knowledgeable work."
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+13

Response time3 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for McCrea Heating & Air Conditioning Services of MD
McCrea Heating & Air Conditioning Services of MD
4.5(
318
)

Serving Dhs, MD and surrounding areas

Approved

In business since 1936

Free estimates

Emergency services offered

"I couldn't be happier with the service I received from McCrea Heating and Air Conditioning Services of Maryland. Upon returning from vacation on a 100 degree July day, I found my old HVAC system basically dead (90 degrees in my kitchen!) ... Shane immediately came out to provide an estimate, we signed a contract on the spot, and he kindly provided some freon to hold me over until the new system could be installed. Brian and Nick showed up exactly on time to install the unit, used drop cloths to protect my flooring, and were exceedingly polite and professional throughout. I'd highly recommend this organization."
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12 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Strive Heating & Cooling, LLC
Strive Heating & Cooling, LLC
4.9(
26
)

Serving Dhs, MD and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Next best thing to having a friend in the business. Keith came to provide an estimate and surprised me by being willing to knock the small job out, right then. What a relief to get it done. Don't tell them, but I would have gladly paid more to get such perfect customer service."
Trane high efficiency Tam9 air handler
Trane Xr14 heat pump
Trane Xr14
Goodman furnace and air conditioning replacement
Goodman furnace and air conditioning replacement

+15

Response time1 day
2 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Petro Home Services
Petro Home Services
4.3(
103
)

Serving Dhs, MD and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"I have a service contract with Petro. They came out to fix a leak on my heater. Service person came out on time, fixed the problem and cleaned up so you would never know he was even there. Very pleasant experience all the way through."
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Response time6 days
Response rate100%
16 neighbors recently requested a quote
Avatar for Modern Mechanical
Modern Mechanical
4.4(
48
)

Serving Dhs, MD and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"We used Modern Mechanical because our home warranty company sent us to them.  They were able to get our repair covered and repaired our unit in a timely manner.  The technician was knowledgeable and helpful.
"
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18 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for SPECS Heating & Cooling
SPECS Heating & Cooling
4.8(
17
)

Serving Dhs, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

"Superb service as the technician was personable, efficient and knowledgeable. He ordered the part, drove to pick it out and returned to complete the replacement and cleaning. I was thoroughly impressed and appreciative."
Response time5 hrs
19 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for D & D HVAC SOLUTIONS LLC
D & D HVAC SOLUTIONS LLC
5.0(
2
)

Serving Dhs, MD and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"David was pretty good, service my ac system and fixed it quickly and at the right price, Iâ ll definitely be using him again and recommend him to my fam and friends"
Old and New Thermostat Comparison
Replacing old Thermostat
Damaged Thermostat terminal
Response time2 hrs
3 neighbors recently requested a quote
Recommended by50%of homeowners
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FAQs for air conditioning projects in Dhs, MD

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 Dhs, MD homeowners’ guide to air conditioning services

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