
Serving Dundalk, MD and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"Changed the brand of heat pump to be installed 24 hours before installation with no prior notice."





+5


Serving Dundalk, MD and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"Changed the brand of heat pump to be installed 24 hours before installation with no prior notice."





+5

Serving Dundalk, MD and surrounding areas
Approved
In business since 2020
Free estimates
Warranties offered
"I couldn?t be happier with the experience. Graham Solution handled the entire installation from start to finish, and the quality of the work was outstanding. He was professional, knowledgeable, punctual, and paid close attention to every detail. The installation was completed efficiently, everything was left clean when the job was finished, and the system works perfectly. It?s hard to find someone who takes this much pride in their work, and it definitely shows. I highly recommend him to anyone looking for reliable, high-quality HVAC installation. Excellent workmanship and great customer service from start to finish!"





+5

Serving Dundalk, MD and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"The company was a pleasure to work with. The quality and professionalism was good. The scheduling was quick and on time. I saw the previous complaints posted, but did not have any problems. I received their name thru Angies List and did not get additional estimates as it was 100 degrees and wanted AC ASAP. We told them that the fan wasn't working and needed repaired. They said the fan motor had a computer chip or some type of computer part with it and that's not common. After testing our AC unit their results showed that the condenser showed a good life span remaining. We were thinking about getting a new unit, they said it was our call but thought a repair would be a good choice. The boss called us and went over their findings and discussed our options. We decided to go with the repair due to the economy and their recommendation. When they removed the old motor they saw that it had been set to medium speed. Since I had previously told them our house is not balanced properly, he set it to high . The only thing I didn't care for was we had to pay for the estimate up front, but the fee was lower than I had expected. When we went to have it fixed they wanted the money up front again. I have always been taught to never do this but to put a deposit it down and pay in full when the job is complete. I did pay upfront again and did not have any problems. I do feel the fee was on the high side but again, I didn't get any other estimates and the other companies probably would have talked me into a new unit. We will see how long this unit lasts. The day after work was performed I had not received a receipt or warranty paperwork. I called the office and explained my thoughts of billing to them and they listened. Before I hung up my paperwork had been emailed to me. I would recommend them. They did not add any Freon and our unit is keeping our home cooler than ever. Thank you At Your Service."





+1

Serving Dundalk, MD and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"I called Pohlman to replace my Gas water heater. I was very pleased with their service. They were very professional, came out on the same day, took the old tank with them and cleaned up well behind themselves, They finish the job in a timely manner and their price was fair. I would definitely hire them again."





+10

Serving Dundalk, MD and surrounding areas
Approved (Corporate)
In business since 1945
Free estimates
Emergency services offered
"Arrived on time , very detailed on a very difficult install . The installation team checked all the boxes, I highly recommend this company for air-conditioning services."


Serving Dundalk, MD and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Fantastic company from start to finish! The gentleman who sold us the furnace, their salesman, Alex, was upfront in getting us the best price, along with a 10 yr parts and labor warranty included! The price for the furnace and installation was great, and they guaranteed apples to apples to meet any other companies cost. They offer a $100. fee if we found anyone to do it cheaper, with the same offer. They were able to schedule the intallation quickly, and did a great job intalling it. I would highly recommend using this company for your heating and air conditioning needs. Great company! Great prices! Great work! You won't be disappointed using Horizon Services! Take care....."





+27

Serving Dundalk, 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!!"


Serving Dundalk, MD and surrounding areas
Approved
In business since 2025
Emergency services offered
Small jobs welcome
"Great company came serviced my unit and got my heat working"





+23

Serving Dundalk, MD and surrounding areas
Approved
In business since 2005
Free estimates
Credit card accepted
We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.\n


Serving Dundalk, MD and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
Rush Delivery LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our 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.
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