Serving Oak Ridge, NC and surrounding areas
Approved
In business since 1991
Emergency services offered
Warranties offered
"The repairman was friendly and efficient - he quickly diagnosed the problem and got the unit cooling again."
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Quick response, polite and very professional. Stephanie, the technician, explained in details what the issue with my central air unit was. Explained the options to repair and costs. Stephanie fix the issue , was very professional and answered all my questions."
+7
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2010
Free estimates
Credit card accepted
"Chris Dorman was professional and easy to talk to you. He came on time and did a wonderful job repairing our air conditioner. He was thoughtful and helpful. No question that Dorman Air will be our go to company for any air or heat issues."
Serving Oak Ridge, NC and surrounding areas
Approved (Corporate)
In business since 1972
Free estimates
Credit card accepted
"From start to finish they remove 2 HVAC systems and installed 2 new systems in 1 day. Got the quote day before and pricing was perfect for us. The crew and there manager kept us updated through whole project and went over everything with us. We couldn’t be more pleased with this company and their crews. I would recommend them if you want quality hard working, professionals that take pride in there work. You will be blown away with there work!! Thank you!!"
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"Good job! Thanks for the tips and good service."
+4
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"The service persons showed up in a timely manner-showed me what the problem was. Cleaned the coils, which hadn't been cleaned since the installation was done in 2004, I was surprised at the amount of dirt that had accumulated. I appreciated them going over everything that was needed. Unit has been running smoothly since their visit."
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 1985
Free estimates
Emergency services offered
"Very well; tech was knowledgeable and professional, very helpful, helped troubleshoot a blower issue we had as well. Freon price seemed a tad high. Other than that, all good."
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2023
Free estimates
Credit card accepted
"Fast professional most reasonable. I will ues this company when needed in the future."
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"I've worked with them for 12 years, high integrity, quick service and always honest."
+8
Serving Oak Ridge, NC and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"We've been using this HVAC company at our restaurant, Curry and Noodle in Winston-Salem, and we couldn't be happier. Running a busy kitchen means our heating and cooling systems take a real beating, and Chris has been nothing short of amazing. He shows up on time, communicates clearly, and always makes sure everything is running perfectly before he leaves. It's rare to find someone who treats your business like it's their own — but that's exactly how Chris makes you feel. Highly recommend to any business owner in the area looking for reliable, honest HVAC service!"
+4
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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