Top-rated air conditioning pros.

Get matched with top air conditioning pros in Hampstead, MD

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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
Response rate100%
4 neighbors recently requested a quote
Avatar for Holtzople Heating, Air Conditioning, & Electrical Services
Holtzople Heating, Air Conditioning, & Electrical Services
4.9(
210
)

Serving Hampstead, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Tim was our technician. he called telling us when he would arrive. He is very professional, friendly and efficient. The work was performed professionally and was reviewed with me before his departure. The air conditioning was tested and the temperature reset before Tim left. We have used this company previously and we are extremely pleased with all of our interactions with the employees. we will Continue using Holtzople Heating and Air Conditioning Service!!. Five Stars!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+47

Response time1 day
Response rate100%
12 neighbors recently requested a quote
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!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+17

Response time1 day
Response rate100%
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 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

"Horizon Services was tasked to replace a 25 year old Central Air system. The team was on time, well mannered, polite, friendly, worked as one unit. Talking and giving suggestions to another if needed. Any mess they made, they cleaned up. I left the house to return to work. I left my cell phone number for them to call me if they completed the job prior to my return. they attempted to return items to their original space. I don't remember the crew taking a lunch break. I asked if anyone had lunch? They stated "finishing this job is more important.". The job took approximately ten hours. (Non stop) It was expensive, but worth it! When they removed the antiquated material it was replaced with brand new up to date equipment., The old equipment was taken away! I would highly recommend Horizon Services to anyone who asked."
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

7 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Blue Dot
Blue Dot
4.1(
347
)

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
467 neighbors recently requested a quote
Recommended by71%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
...
Showing 1-10 of 269

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.