Serving Roswell, GA and surrounding areas
Approved
Super Service Award Winner
In business since 1966
Free estimates
Emergency services offered
"Our technition reacted immediately when we explained the problem. He air conditioning unit and resolved the problem in minutes."
Serving Roswell, GA and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"A giant shoutout to Atlanta Air Authority for coming to our rescue this week. We came home from being out of town on Sunday to a hot house. Our A/C unit was toast. Their quick response and fantastic service had us back up and running with a new unit within 3 days. Canâ t say enough good things about them. Definitely check them out next time you need HVAC service!!"
+9
Serving Roswell, GA and surrounding areas
Approved
In business since 1986
Free estimates
Emergency services offered
"This was my second quote and this company is amazing. Quickly identified the issue, changed the motor, provided a filter and made sure everything was working on one trip within a few hours. The previous company (Air Pros, LLC) said it was unfixable and tried to sell me a new unit over $6k which was a huge scam. Don't go to those guys, work with this family owned honest business. Keep in mind HVAC repairs in many cases are not cheap, I own 3 houses and have paid several hundred or more when an HVAC is old and need repairs."
Serving Roswell, GA and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"I was really worried I would have to go a few days or even a week without cool air, but I called Dayco Systems that my friend recommended and I'm SO glad I did! They came out right away, after hours and fixed the unit. I highly recommend this company!"
+48
Serving Roswell, GA and surrounding areas
Approved
In business since 2010
Emergency services offered
Warranties offered
We are a full service HVAC company. Our services include: diagnostic, maintenance service, repair, replacement, retrofit, pre-purchase inspection, and second opinion. We will diagnose, design and install the correct heating and/or air conditioner system to fit your individual needs. We are fully insured and bonded. We provide unsurpassed service and experience. We are timely and organized. Our strength lies with our integrity, knowledge, and faith. We Supply Our own parts, any parts supplied by consumer will come with additional fees. Diagnostic Fees Due at time of service $79.00 daytime / $118.50 after 5pm. \n
+18
Serving Roswell, GA and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Our AC went out in the middle of summer and I called to schedule an appointment and they made it out the same day! They were very professional and completed the necessary maintenance extremely quickly. We had air again by the end of the day. It’s also one of the most affordable places we’ve ever used for our heating and air maintenance and repairs."
+17
Serving Roswell, GA and surrounding areas
Approved
Super Service Award Winner
In business since 2019
Free estimates
Emergency services offered
"Best heating and air company I have ever used. Great customer service!"
+3
Serving Roswell, GA and surrounding areas
Approved
In business since 2009
Free estimates
Credit card accepted
"Repaired stalled air conditioner promptly, efficiently, and reasonably."
Serving Roswell, GA and surrounding areas
Approved (Corporate)
In business since 1898
Free estimates
Emergency services offered
"We quit using them because their service fees were too high. The guy who put the air conditioner was excellent."
Serving Roswell, GA and surrounding areas
Approved (Corporate)
In business since 2011
Emergency services offered
Credit card accepted
"I gave Cool Air Mechanical a call after reading their good reviews online. Every one I dealt with on the phone was very helpful, and were able to get help out to us ASAP. Jerry C. who came out was very knowledgeable, friendly, and professional, and was able to diagnose our issue quickly and provided great options and advice. He returned with the replacement part and repaired our unit very quickly. I will definitely be calling on them, and Jerry specifically, for any work on our system in the future."
+35
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.
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