Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"The process was easy and the service top notch from the estimate with the sales rep to scheduling and the install. Ill recommend them to anyone who needs heating and air services."
Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 1971
Free estimates
Warranties offered
"Once the salesman got here and found out it was an attic air handler. He told me they do not do attic work in summer. He said if I was still looking in the fall he wanted me to call him. It would have been nice if his office staff asked it unit was in the attic and save both of us the time"
Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 1978
Free estimates
Credit card accepted
When looking for professional HVAC services, look no further than GLM Mechanical Services, Inc. \nWhat we offer is honest, open estimating, with strict attention to detail and on time delivery. All we ask is when calling PLEASE speak english. WE can't help you if we can't understand what you need to tell us. Unfortunately, we do not offer attic installations when outdoor temperatures are so hot that attic temperatures can reach 100 degrees or higher. We cannot ask our employees to work under those conditions. We can bring to the table a level of expertise not usually available to residential projects. We have several years experience providing prompt and reliable services building your dreams into reality. We will always meet and exceed all expectations. Proudly handling the Goodman and Airtemp brands of HVAC equipment. Give us a call, you will be glad you did.\n\nWe now accept Visa, Mastercard, & Discover.
Serving Gwynn Oak, 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.
+2
Serving Gwynn Oak, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Emergency services offered
"Air conditioning stopped working. They were quick, courteous and reasonably priced. The technician explained to me what we was going to do and how he would determine what the issue was. I will use them again if the need arises."
+118
Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
Pohlman Plumbing is a local, family-owned and -operated full-service plumbing and HVAC company serving the Baltimore metro area. Founded in 2008, our professional and friendly customer service plus our top-notch skills have made us one of the most trusted local plumbers in Baltimore.\n\nWhen you choose to work with Pohlman Plumbing, you can have peace of mind knowing we always stand by the Pohlman Promise: fast service, at a fair price, and done right the first time.
+10
Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 2020
Free estimates
Warranties offered
"I had a great experience with this HVAC company! They were professional, arrived on time, and quickly diagnosed the issue with my air conditioning unit. They explained the repair clearly, completed the work efficiently, and had my AC running perfectly again. The technician was courteous, knowledgeable, and took the time to answer all of my questions. I really appreciated the honest service and fair pricing. I highly recommend them to anyone looking for reliable HVAC service!"
+5
Serving Gwynn Oak, 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."
Serving Gwynn Oak, MD and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Very professional, good HVAC installation experience, very officiant, Cleaned up after work, did a excellent job installing heat pump outside and air handler on the attic"
+1
Serving Gwynn Oak, 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."
+27
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.
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