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Avatar for Presidential Heating & Air Conditioning
Presidential Heating & Air Conditioning
4.6(
455
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral Humidifier - Install or Replace+12 more

Serving Washington, DC and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1982

Free estimates

Emergency services offered

"The Air Conditioner service man who is Walter Gil gave excellent service for the Air Condition, He had great rapport with the customer and answer all the questions that I asked. I rated him five stars for his services."
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+6

26 neighbors recently requested a quote
Recommended by87%of homeowners
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Avatar for Last Minute Services, PLLC
Last Minute Services, PLLC
4.9(
113
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Washington, DC and surrounding areas

Approved

Super Service Award Winner

In business since 2003

Free estimates

Emergency services offered

"Mr. Nicholas Cohen and staff of Last Minute Services PLLC were professional and knowledgeable in installing a new air conditioning unit on the roof of a 3 story condo building. He explained that he would be able to get a slim unit so that the rental of a crane would not be necessary. I will be using Last Minute Services for future plumbing work."
Old heat pump
New heat pump
New Heat Pump
-facile
-facile

+45

Response time5 hrs
6 neighbors recently requested a quote
Recommended by76%of homeowners
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Avatar for Polar Bear Air Conditioning And Heating Inc
Polar Bear Air Conditioning And Heating Inc
4.4(
237
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+12 more

Serving Washington, DC and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"I had a 20+ year old air conditioning system and didn't want to nurse it through another summer season so I started looking for a replacement during the very polar cold month of February 2019. Of the three bids I received, I was most impressed with Polar Bear Air Conditioning & Heating Inc's responsiveness, professionalism and price. Three days after I signed a contract, Team Polar was at my house at 8:30 am and by 1:00 pm I had a new air conditioning system! The team worked fast, was pleasant, provided updates and handled the one problem encountered, the condenser wouldn't fit through the front door of my old DC townhouse, with grace and humor as they hauled it around the block and in through the back walkway. I'm looking forward to having a cool, reliable and energy efficient system this summer and would definitely recommend Polar Bear Air Conditioning & Heating Inc. to anyone looking for a new system. Thanks again Polar Bear Air Conditioning & Heating Inc!"
Response time1 day
24 neighbors recently requested a quote
Recommended by88%of homeowners
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Avatar for McCrea Heating & Air Conditioning Services of MD
McCrea Heating & Air Conditioning Services of MD
4.5(
318
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+6 more

Serving Washington, DC and surrounding areas

Approved

In business since 1936

Free estimates

Emergency services offered

"Checked Angie's List and saw a very good review for McCrea Heating and Air Conditioning, plus a special promotional coupon so gave them a try. Service tech (Mike) made a multi-point inspection. He found and corrected some minor issues and added coolant. Fortunately nothing major was required. He was on time and courteous, and readily answered the questions I peppered him with. A very positive experience."
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12 neighbors recently requested a quote
Recommended by87%of homeowners
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Avatar for McCarthy Services
McCarthy Services
4.2(
370
)
Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Repair or Service+3 more

Serving Washington, DC and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Credit card accepted

"They really helped out in a serious bind! Great customer service and install. You wouldn’t even know they had been in our home to install a new furnace and air conditioning units. Highly recommend!"
Installing a new A/C system.
452 neighbors recently requested a quote
Recommended by91%of homeowners
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Avatar for Cyprus Air Heating, Cooling and Fireplaces
Cyprus Air Heating, Cooling and Fireplaces
4.0(
525
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business

Serving Washington, DC and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"It was good. They have a lot of options. They did 2 hvac on me. They were professional and on time. They provided a photo of the technician so I knew who was coming"
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+13

Response time8 hrs
Response rate100%
62 neighbors recently requested a quote
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Avatar for Petro Home Services
Petro Home Services
4.3(
103
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Washington, DC and surrounding areas

Approved (Corporate)

In business since 1903

Emergency services offered

Warranties offered

"

we had a leak problem and the tech came and looked over our equipment, fixed the problem and left. It cost us nothing and we have had their home heating service contracts for over 20 years.  They have NEVER ONCE not shown up or not helped and in the two furnace emergencies we had--they were here with in 1hr. 

We are very happy.


"
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Response time6 days
Response rate100%
18 neighbors recently requested a quote
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Avatar for HVAC Superior Solutions Inc
HVAC Superior Solutions Inc
5.0(
6
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business+12 more

Serving Washington, DC and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

FULL HVAC REPAIR AND REPLACEMENT- ALL HVAC MAKES AND MODELS OF EQUIPMENT. Professional HVAC technicians in the DC-MD-V area. Knowledge, Tools and Skills at your service. HVAC Superior knows how much you and your family depends on your A/C and Heat service system, so we make sure it continuously provide an excellent performance.

12 neighbors recently requested a quote
Recommended by100%of homeowners
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Haygood Mechanical, LLC
4.4(
146
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Washington, DC and surrounding areas

Approved

In business since 2001

Credit card accepted

Customers say: Quick response

"Mr. Haygood came out promptly on a weekend. He identified the problem immediately and had my AC up and running in no time. His advise and suggestions were spot-on. I will definitely use Mr. Haygood for my future A/C needs!!"
Response time4 hrs
Response rate100%
4 neighbors recently requested a quote
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Avatar for JC & JC HVAC Mechanical Contractors, LLC
JC & JC HVAC Mechanical Contractors, LLC
4.2(
129
)
Central A/C - Service or Repair

Serving Washington, DC and surrounding areas

Approved

In business since 2009

Emergency services offered

Credit card accepted

"They did not work on the outside AC unit they just inspected it. They provided a cost to replace the condenser but it was to high."
JC JC HVAC
JC JC HVAC
JC JC HVAC
Response time2 hrs
Response rate88%
1 neighbors recently requested a quote
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FAQs for air conditioning projects in Washington, DC

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 Washington, DC homeowners’ guide to air conditioning services

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

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