Serving Dunbar, WV and surrounding areas
Approved
Super Service Award Winner
In business since 2017
Free estimates
Warranties offered
"Great clean friendly good service very reliable"
Serving Dunbar, WV and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"The company ensured the installation was properly performed and the new heat pump was level. Due to the previous lack of workmanship and maintenance from another company, our former heat pump started leaking."
Serving Dunbar, WV and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Caleb and Travis did a great job! Amazing kitchen range vent hood install. Reasonably priced and 10/10 work."
+38
Serving Dunbar, WV and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"I had another air conditioning project that would have been quite costly, but advice from Chris led me in another direction, which saved me at least $1000,00. He could have easily taken advantage of my situation, but did not. For that, I thank him."
Serving Dunbar, WV and surrounding areas
Approved
Super Service Award Winner
In business since 2001
Warranties offered
Small jobs welcome
"The service was very good. They did everything good. I like how fast they were. They did a great job."
+43
Serving Dunbar, WV and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"Couldn't afford to pay for an AC system, and labor, so I contacted Tom Martin of MMG and he was kind enough to send 5 star rated Senior HVAC Technician Dennis Canterbury out to tell me everything needed to have a fully functional AC system, allow me to purchase my own parts and do my own labor and then have them come back out and hook it up. Now that's top notch service!!!! 5 out of 5? More like 10 out of 10!!! I'll quote you this "If you're in need of HVAC, plumbing or electrical services, residential or commercial, from a company you can trust to go out of their way to make sure that you're sitting pretty in hard times. THEN YOU NEED MMG.""
+11
Serving Dunbar, WV and surrounding areas
In business since 2009
Free estimates
Emergency services offered
"Vic s came to fix the air conditioning the next day and was friendly, knowledgeable and affordable."
Serving Dunbar, WV and surrounding areas
In business since 2015
Free estimates
Emergency services offered
"Work was vary satisfactory, and professionally coordinated with City authorities to be properly up to code."
+4
Serving Dunbar, WV and surrounding areas
In business since 2015
Free estimates
Credit card accepted
"I will hire this company again."
Serving Dunbar, WV and surrounding areas
In business since 2009
Emergency services offered
Credit card accepted
"Roger Prevette and his employees saved me from a real life emergency by coming to my aid during this electrical outage, never leaving me and doing everything even going above and beyond what you would normally expect from a contractor. As an owner of the company Mr. Prevette did not have to be there during my troubles, but he is a person that cares about the people that he serves and he stayed with me until final electrical inspection was completed, the power company came to reconnect my service and my whole home generator was repaired and ready for my use whenever a power failure occurs. His whole company is very professional and willing to do the best job possible. If you need any of the services that he provides, give him a call and I am sure you will be absolutely overjoyed and the service that you get. He even offered to go get his personal generator and hook it up for me if we were unable to get the other sources back into operation. To me this man is a hero."
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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