Serving Winston Salem, 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 Winston Salem, 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 Winston Salem, NC and surrounding areas
Approved
Super Service Award Winner
In business since 1999
Free estimates
Emergency services offered
"QRC did an awesome job with my HVAC replacement! Highly recommend them for any of your HVAC needs!"
+21
Serving Winston Salem, NC and surrounding areas
Approved (Corporate)
In business since 1972
Free estimates
Credit card accepted
"Heat pump actually needs to be replaced. Tech showed me video and testing he performed. And why my heat pump was not working. Got up to a cold house this morning. Tried everything I knew to get the house warmer. Called ARS, the scheduled tech and he showed up the same day. I will have to wait for new heat pump to come in. I am satisfied with service so far."
Serving Winston Salem, 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 Winston Salem, NC and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"My A/C went out and my home warranty sent out a company that said the coil needed to be replaced. They sent me an invoice that was way more than I expected so I decided to get another opinion. I listed my issue on Home Advisor Sunday morning and Shamrock called me within 10 mins. They came out to diagnose my issue free of charge AND knowing that I had been without air for a week already they loaned us a window unit. They came out the next day, put the window unit in and checked my system. Found out that the issue was not the coil, but even if it was the charge was way less than the invoice I had received from the other company. Thanks to Shamrock our air is working better than ever. Very prompt, courteous and thorough. Fixed issues that previous company created. Highly recommend!!"
Serving Winston Salem, NC and surrounding areas
Approved
In business since 2007
Credit card accepted
Customers say: True professional
"They completed all work in one day and left all areas in good condition. Their office staff completed and filed all paperwork for warranties and rebates. I highly recommend this company"
+2
Serving Winston Salem, NC and surrounding areas
Approved
In business since 1985
Free estimates
Emergency services offered
"The technician cleaned and calibrated the air conditioner. He pointed out that we had a part that was aging and could possibly fail at any time. He asked if we wanted to replace it. We told him to do what he needed to do to get the air conditioner working at full capacity. He quoted a price of $132. After checking our account, he returned to tell us that the part is covered under the 10 year warranty. He was very thorough and meticulous with his work.
We have dealt with Duggan for 8 years and had our unit serviced spring and fall each year. The office always communicates with the customer and let you know when the technician is on the way. During the eight years, all the technicians were knowledgeable, professional and are always very polite. They wear shoe covers when in the house and leave their work area clean.
Highly recommend Duggan.
"
Serving Winston Salem, NC and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"The technician was very professional and very helpful. He was obviously very knowledgeable and knew exactly what our issue was. Replaced the part we needed same day! Decided to call them after having issues with another company last summer. Thanks!!!"
Serving Winston Salem, NC and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"I put A/C as the service, but I have a heat pump system, so this included both heat & air. I was impressed by their estimator, Alan, because he really took the time to do a thorough inspection. He also was here on day to help out with the job. All of the technicians were wonderful. This company goes the extra mile for their customers and I cannot recommend them highly enough."
+8
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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