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Avatar for McCrea Heating & Air Conditioning Services of PA
McCrea Heating & Air Conditioning Services of PA
4.7(
317
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+6 more

Serving Walkersville, MD and surrounding areas

Approved

In business since 1936

Free estimates

Emergency services offered

"As always, whichever McCrea service person arrives to work on my air conditioner/furnace, they are always friendly, willing to engage in discussion about my systems, and knowledgeable about what they are working on. I always gets a text and email the day before the scheduled service visit, as well as about 30 minutes before they are due to arrive. This was the first time I used the tracking link provided so I knew when he was going to arrive at my house. Going on 6 years using McCrea and I have never had a problem with them."
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6 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Holtzople Heating, Air Conditioning, & Electrical Services
Holtzople Heating, Air Conditioning, & Electrical Services
4.9(
214
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+6 more

Serving Walkersville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"They are prefect! Lifetime heating and air conditioning company."
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+47

Response time1 day
Response rate100%
33 neighbors recently requested a quote
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Avatar for Hecomo
Hecomo
5.0(
11
)
Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Install or Replace+4 more

Serving Walkersville, MD and surrounding areas

Approved

Credit card accepted

Customers say: True professional

We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today! \n

Heating & A/C Project
Heating & A/C Project
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+8

Response time8 hrs
Response rate100%
10 neighbors recently requested a quote
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Avatar for Tetteris HVAC
Tetteris HVAC
4.7(
192
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+1 more

Serving Walkersville, MD and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"After several years of shoddy furnace repairs, replacements and guesswork from our propane provider, I decided to find another service. I quickly got a call back and appointment from Tetteris Heating and Air. After a brief diagnostic, Greg Shaeffer almost immediately assessed the problem was a malfunctioning gas valve. After replacing and converting the valve, he discovered that the old valve had not been installed or converted properly by the previous company. Greg was very professional, helpful, friendly and didn't mind answering any questions I had. I couldn't be more satisfied with the work and service that Tetteris provided. Highly recommended!"
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9 neighbors recently requested a quote
Recommended by94%of homeowners
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Avatar for Harrell's Services
Harrell's Services
5.0(
6
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Walkersville, MD and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"Customer service was excellent!! The job was done in a timely manner. Service on our A/C unit was excellent. Would highly recommend this company."
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+5

3 neighbors recently requested a quote
Recommended by80%of homeowners
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Markool Heating & Cooling, LLC
4.7(
21
)
Central A/C - InstallCentral Humidifier - Install or ReplaceCentral A/C - Install - For Business+10 more

Serving Walkersville, MD and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"⭐⭐⭐⭐⭐ Exceptional and Honest Local Service"I cannot recommend Markool Heating & Cooling enough! They were prompt, incredibly professional, and truly care about getting the job done right without overcharging. As a smaller local business, you get highly personalized care and direct communication with the people actually doing the work. They are my go-to for all HVAC needs.""
Response time7 hrs
5 neighbors recently requested a quote
Recommended by84%of homeowners
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Avatar for ARS of Maryland
ARS of Maryland
4.1(
177
)
Central A/C - Service or RepairCentral A/C - InstallCentral Humidifier - Install or Replace+3 more

Serving Walkersville, MD and surrounding areas

Approved (Corporate)

In business since 1945

Free estimates

Emergency services offered

"My husband and I were very happy with the service we received from ARS and we will continue to employee them for all our air conditioning needs."
New System Installation
403 neighbors recently requested a quote
Recommended by73%of homeowners
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Avatar for Wenbrooke Services
Wenbrooke Services
4.6(
107
)
Central A/C - Install

Serving Walkersville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Emergency services offered

Warranties offered

"Very fine and courteous service. When the replacement vent/light bathroom fan didn't fit he ordered another. The new fan was quickly installed the next day."
Commercial Sign
Dinning room fixture
Commercial Office
Kitchen Pendants
Response time11 hrs
71 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for SPECS Heating & Cooling
SPECS Heating & Cooling
4.8(
17
)
Central A/C - Service or Repair

Serving Walkersville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Credit card accepted

"I recently had SPECS Heating & Cooling install an AprilAire humidifier for me, and I couldn't be happier with the results. From start to finish, their service was exceptional. The team was professional, knowledgeable, and efficient, ensuring that the installation process went smoothly. Since having the humidifier installed, my indoor air quality has significantly improved, and I've noticed a positive difference in the comfort of my home. I highly recommend SPECS Heating & Cooling for their top-notch service and expertise in HVAC solutions. Five stars all around!"
Response time5 hrs
11 neighbors recently requested a quote
Recommended by50%of homeowners
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Avatar for Blue Dot
Blue Dot
4.1(
352
)
Central A/C - Service or RepairCentral A/C - InstallCentral Air Cleaner - Install or Replace+3 more

Serving Walkersville, 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
593 neighbors recently requested a quote
Recommended by70%of homeowners
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FAQs for air conditioning projects in Walkersville, 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 Walkersville, MD 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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