Serving Colfax, 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 Colfax, 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 Colfax, NC and surrounding areas
Approved
In business since 2010
Free estimates
Credit card accepted
"100% positive experience. Dorman Heating and Air did not disappoint in anyway...reliable, reasonable, knowledgable, and professional, and last but not least honest and trustworthy in the installation of my new hvac system. I highly recommend this company and feel you will not be disappointed."
Serving Colfax, 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 Colfax, 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 Colfax, 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 Colfax, 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 Colfax, NC and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"The company is so helpful and actually cares about getting things right! AC works better than ever and I am ready for the summer now!"
Serving Colfax, 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
Serving Colfax, NC and surrounding areas
Approved
In business since 2017
Free estimates
Credit card accepted
"Highly recommend these guys. They do a good job of keeping you informed throughout the process. Also shoutout for my heating . They did an outstanding job and made sure the job was done right. The quality of work shows with how clean"
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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