Serving Zebulon, NC and surrounding areas
Approved
Super Service Award Winner
In business since 2007
Free estimates
Emergency services offered
"I highly recommend Carolina Comfort and Air. Tommy and Hassan were very professional and awesome to deal with."
+45
Serving Zebulon, NC and surrounding areas
Approved
In business since 1996
Free estimates
Warranties offered
"Just had my first service check up on my heating and air conditioning unit. As was the install the scheduling was easy. The technician called prior to arrival. I met him at the door and he explained everything that the service included. Then he went about his business. The report was concise and I am extremely pleased with his professionalism and manner. I highly recommend Maynor for your installation and service needs."
Serving Zebulon, NC and surrounding areas
Approved
In business since 2002
Warranties offered
Credit card accepted
"Outstanding. Will absolutely use them again for any appliance or HVAC"
Serving Zebulon, NC and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"After numerous "pros" came to repair my HVAC system, I always got the same response....you need a new system for 8.5 to 12.5k. What they don't know is I know enough about these systems to know the cost of parts and how the system works. So when the "technician" shows up and says they don't know which of the 5 parts was a problem, I'm skeptical. I just don't want to fix everything myself anymore. Comfort Monster is different. The difference is their technicians do not work on commission. Repairman from other companies get paid when the customer has to buy a new HVAC system, giving no incentive to fix anything. Comfort Monster technicians take pride in solving the puzzle of why the machine isn't working. I have two systems and when they inevitably have a problem, I'm calling these guys. Dude even gave my little girls Comfort Monster plush toys and they carry them everywhere!"
Serving Zebulon, NC and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Free estimates
Emergency services offered
"They were very fast to come out and fix my air conditioner"
Serving Zebulon, NC and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"This is a great company. Communication was great from start to finish, short wait time and the project was completed in a timely manner. I am extremely happy about the work and professionalism provided by Mr. Paez. He was very knowledgeable about my Central air conditioning system and did a great job in repairing it. I highly recommend M.S.G."
+1
Serving Zebulon, NC and surrounding areas
Approved
In business since 2007
Free estimates
Credit card accepted
Arproser Heating and Air, has over 20 years of experience so you can rest assured you have hired the best. Being a locally owned and operated company, Arturo will be the one that greets you on the phone and the person on site ensuring your home's comfort and safety. Our reputation is based on service, safety, and quality, also Arturo is HVAC active instructor at Waketech Community College and this ensure you will get the best service at your fingers.
+24
Serving Zebulon, NC and surrounding areas
Approved (Corporate)
In business since 1976
Free estimates
Credit card accepted
"ARS did a very good job installing my air conditioning unit. They took the time necessary to move a piece which was in the way of installation. Then it was put back in the appropriate manner and when a part didn't work, they rigged it to work until the part could be replaced. The part was replaced the next day and the AC works as it should."
Serving Zebulon, NC and surrounding areas
Approved
In business since 1994
Emergency services offered
Warranties offered
"Our AC broke at the worst time: Memorial Day weekend. We called several emergency repair companies before Dominion Services, but none of their emergency technicians got back to us. We waited for over twelve hours in our hot home for someone to call us back. Finally, we used Home Advisor to contact Dominion Services Heating & Air. We immediately got a call from the company to confirm our appointment! The technician (Tarone?) was at our house within an hour and had the problem fixed in 30 minutes. I could have cried I was so relieved. Excellent service. We will definitely be using them for all of our future HVAC maintenance and services!"
+7
Serving Zebulon, NC and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Ryan called me within minutes of requesting a repair on a Sunday because my AC stopped working in the heat of summer. Quickly diagnosed and fixed the issues. He answered my all my questions and made suggestions on how to keep pine straw out of the unit. Paperless bill and ability to accept mobile payment or written check. I will be calling him again to do regular maintenance on my heating and cooling system in the future."
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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