Serving Boonsboro, 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."
+47
Serving Boonsboro, MD and surrounding areas
Approved
In business since 1936
Free estimates
Emergency services offered
"It went really well. Our tech, Larry Saylor, was very professional and very knowledgeable. Larry did a great job and now McCrea Heating & Air Conditioning Services of PA is our "to-go-to" business of Heating & A/C. Thank you."
Serving Boonsboro, MD and surrounding areas
Approved (Corporate)
In business since 1970
Free estimates
Warranties offered
"Angie's List reviews made me go with GAC Services for a new furnace and air conditioning unit. Five mechanics showed up early in the morning in three trucks. They were clean cut young men and very polite. They made a lay down area in my basement with blankets. They wore covers over there shoes while in and out of the house. They were very respectful of my home. They worked non stop until 5:00 PM. They had a separate sheet metal mechanic that showed up and did really nice sheet metal work. I was impressed. After a year went by my thermostat went out and they came out and replaced it free of charge. I signed up for the maintenance contract and they come out twice a year . Once in the winter and once in the summer. Another part went bad after two years and it was under warranty and they replaced it free of charge. They are honest and reliable. I highly recommend them."
Serving Boonsboro, MD and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"They still need to replace the door of the air handler"
Serving Boonsboro, 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!"
Serving Boonsboro, MD and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
We are a small family owned Heating, Ventilation, and Air Conditioning (HVAC) company located in Sharpsburg, MD. The business was started in 1989 under the name of RW Harrell's Pump Service Inc. when Diane Harrell and Ronnie Harrell purchased a well pump and water system business from a gentleman that was retiring. Ronnie had worked in the HVAC field from the time he had graduated from high school so it was natural to add HVAC to the services that this new company would offer. Ronnie and Diane built the company by word of mouth and continue to grow the company in this manner. Additional DBA - Harrell's Services. Additional fax - 928-492-8004
+5
Serving Boonsboro, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Emergency services offered
Warranties offered
"They were all very nice and professional. They did an outstanding job on replacing our heating and air unit."
Serving Boonsboro, MD and surrounding areas
Approved (Corporate)
In business since 1981
Free estimates
Emergency services offered
"It was pricy, but it was good service. Well, that's hard to say because it's all expensive, as oppose to any other air conditioning company, it's about the same, just too much money in general."
Serving Boonsboro, MD and surrounding areas
Approved
In business since 1976
Emergency services offered
Warranties offered
"I regularly use their plumbing and heating services."
+11
Serving Boonsboro, MD and surrounding areas
Approved (Corporate)
In business since 2009
Free estimates
Credit card accepted
Comfort First Heating & Cooling is the team you need for all your home solutions. Comprehensive comfort is our legacy.\n\nWe're dedicated to delivering unparalleled customer service that mirrors our core values of integrity, stewardship, and excellence.\n\nWe look forward to having you join the Comfort First family as we continue our mission of creating customers for life by earning your business.
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.
From average costs to expert advice, get all the answers you need to get your job done.
Need fascia and soffit repairs? Hiring a pro ensures proper installation, protects against pests, and prevents structural damage. Learn about common warning signs, material options, and how fascia and soffits safeguard your home from moisture.
Use this guide to budget for oak flooring installation based on factors such as room size, type of flooring, stain and sealant, and labor.
Budget for the cost to install a propane furnace based on factors such as furnace size, furnace type, efficiency level, labor rates, and more.
Discover how much it costs to hire a housekeeper based on factors like house size, required services, and cleaning frequency.
HomeAdvisor's Lighting Repair Cost Guide lists price information on fixing a light or light fixture, as reported by HomeAdvisor customers.
Use this guide to budget for wall oven installation costs based on factors such as oven type, power source, mounting type, labor, and more.