Serving Markham, VA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Our heat went out in the worst conditions...Sunday night with a snowstorm on its way. Matt came out, troubleshooted our furnace and the family was warm in no time. Great customer service and competent expert with over 15 years supporting this areas families"
+2
Serving Markham, VA and surrounding areas
Approved
In business since 1936
Free estimates
Emergency services offered
"The quality of the work was great, it is the product I am not sure about. Just had the system put in last year and the mother board needed to be replaced. While it took longer than expected to receive the part, once received, it was replaced the next business day. The technicians were knowledgeable and efficient. They replaced the part and performed the inspection; and explained it all so I could understand what they did (they even replaced the air filter without my asking). I have used this company for over ten years and find their employees willing to help me keep my system running smoothly and efficiently. I highly recommend McCrea of VA for your HVAC needs."
Serving Markham, VA and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Offers commercial services
"Gerald was fantastic! He was very knowledgeable about the type of system that would best fit our house and worked with us on what we wanted. Gerald started the job quickly and was only delayed due to other contracting issues. He was very patient working with us in between new siding and drywall and made sure he was available when the other contractors were through with other issues. Gerald?s work was neat and tidy. And pricing was definitely fair. We high recommend The Air We Breathe for your heat and air needs!"
Serving Markham, VA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"My house to install HVAC system is in Virginia Beach, Virginia."
+11
Serving Markham, VA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Very pleased with first time using this company and recommend them to the next person in need of air conditioning or HVAC repairs. Nice job."
+7
Serving Markham, VA and surrounding areas
Approved (Corporate)
In business since 1950
Free estimates
Emergency services offered
"Tech immediately diagnosed problem that the filter needed replacement. Customer hadn’t received new filter and old filter was choking air flow."
Serving Markham, VA and surrounding areas
Approved
In business since 1976
Free estimates
Emergency services offered
"It went very well. They scheduled the time, They were on time, very thorough with their inspection of my air conditioning quickly and gave me various options on what I can do as far as getting a maintenance contract with them or getting a new air conditioning system. The professional and the demeanor of the guy that came over stood out."
+1
Serving Markham, VA and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"There was a snag at the beginning when they realized, after beginning to dig, that the AC unit was on top of the oil tank and they'd have to call someone in to move it before digging could continue. That delayed things a few days, but thereafter they did a good job of digging and were very careful with our trees. They also took care not to ruin the lawn with the machinery. The new tank and heater were quickly put in the basement with no problems."
Serving Markham, VA and surrounding areas
Approved
In business since 2012
Free estimates
Offers commercial services
"T&J Service installed a beautiful new Trane system at my home in Fairfax on May 14, 2024. They were recommended to me by my neighbor who has been using them for many years. Without a doubt, Diep and Tran are the most highly-skilled HVAC professionals that I have encountered in over 40 years. This was a very large, complex system to install and they got it done in one day. These are some of the hardest working, most dedicated guys that I've ever seen! I absolutely love my new Trane system. They even custom made a beautiful plenum for my air handler --handcrafted out of stainless steel (Diep is also a skilled metal craftsman). 5 STARS"
Serving Markham, VA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"Excellent Service .. had gas fireplace cleaned,inspected for safety, and determination of a remote model number .. waiting for remote install, but excellent to date"
+61
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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