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Find Air conditioning pros in Hampstead

Avatar for Dean's Heating & Air Conditioning
Dean's Heating & Air Conditioning
4.9(
110
)

Serving Hampstead, MD and surrounding areas

Approved

In business since 1988

Free estimates

Emergency services offered

"Dean's Heating and Air Conditioning have been great since the first call I received back from Lisa. They are very customer focused!! Mike and his team did an excellent job and went above and beyond to replace our duct system that had rusted and collapsed. This was not an easy job b/c our duct work is under the house in a crawl space. ]hey took the time to assess the space and our problems and designed a system that works better than what was there before. They were very professional and Mike explained things every step of the way. If you want someone who is thorough, pays attention to detail and customizes a solution that works for your specific needs, I would highly recommend Deans Heating & Air Conditioning! They did a great job!"
Response time4 hrs
5 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for Holtzople Heating, Air Conditioning, & Electrical Services
Holtzople Heating, Air Conditioning, & Electrical Services
4.9(
209
)

Serving Hampstead, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Austin was very professional. He understood our needs and took the time to explain our options in detail and to make the right choice for our home. With the weather being so hot and our old system died (old system was not Trane) he was able to get a new system installed in 2 days! If you are looking for a new heating and air conditioning system Holtzople Heating, air conditioning and Electric is the only one you should choose."
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+47

Response time12 hrs
12 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Tim Kyle Electric Heating & Cooling
Tim Kyle Electric Heating & Cooling
4.9(
369
)

Serving Hampstead, MD and surrounding areas

Approved

Super Service Award Winner

In business since 1986

Emergency services offered

Warranties offered

"They checked the smoke alarms, lights etc. They vacuumed the vents in the bathroom. They are excellent. They will come out on Sundays' and holiday's which is unheard of!!! Leeland is great. He goes over everything with me and explains it. He uses down to earth language so I can understand it. I think its great they take the time to do that!"
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+17

Response time1 day
Response rate95%
22 neighbors recently requested a quote
Avatar for Bamford Plumbing and Heating Inc
Bamford Plumbing and Heating Inc
4.8(
65
)

Serving Hampstead, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

**SPECIALIZING IN BOILER REPAIR AND REPLACEMENT**\n** WE OFFER 24/7 EMERGENCY SERVICE** Bamford Plumbing & Heating Inc. has been providing excellent customer service since 2009. We are a family owned and operated company with over ten years of experience in the plumbing and heating industry. We are licensed and insured in the State of Maryland. We offer 24 hour emergency service and free estimates on new work.

Do you know if your sump is still working? We also have sump pumps avialable to protect you from power outages. That’s right no power no problem forget about the “battery back up” sump pumps if you have municipal water supply this is the way to go call today for details !
Tankless
Power Vent
Gas and Electric
Tree roots giving you problems with your drains? Have us come out today and try a Rootx root treatment !

+2

3 neighbors recently requested a quote
Recommended by98%of homeowners
Markool Heating & Cooling, LLC
4.7(
21
)

Serving Hampstead, MD and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Just started working with Markool this summer and they have been fantastic! When I need service, they are so fast and every person we have interacted with has been polite, knowledgeable and personable. We unexpectedly needed to replace our system during a heat wave and they were super. So responsive and quick. I would highly recommend Markool for all of your HVAC needs!"
Response time7 hrs
4 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Blue Dot
Blue Dot
4.1(
345
)

Serving Hampstead, MD and surrounding areas

Approved (Corporate)

In business since 1982

Free estimates

Emergency services offered

"I purchased the Annual Maintenance Plan for my Heating & Air Conditioning systems. Blue Dot has excellent customer service. Adrian serviced my heating system yesterday and he was great!!"
System Installation
531 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for Horizon Services, LLC (MD)
Horizon Services, LLC (MD)
3.8(
1,464
)

Serving Hampstead, MD and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Technician was prompt, competent, and professional. In addition to the service rendered which was to repair my air conditioner unit, I signed up for an annual service agreement with Horizon."
Horizon Services Heating and Cooling
Horizon Services Heating and Cooling
Horizon Services Heating and Cooling
Horizon Services Heating and Cooling
Horizon Services Heating and Cooling

+27

6 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for VICTORY HVAC LLC
VICTORY HVAC LLC
5.0(
17
)

Serving Hampstead, MD and surrounding areas

Approved

In business since 2025

Emergency services offered

Small jobs welcome

"If you’re looking for a skilled, trustworthy HVAC technician who goes above and beyond, Yossi is the one to call. I highly recommend him and would absolutely use his services again."
Setting air handler
duct work
Return air box
Supply ductwork
air handler set up

+23

3 neighbors recently requested a quote
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FAQs for air conditioning projects in Hampstead, 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 Hampstead, MD homeowners’ guide to air conditioning services

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