Serving Las Vegas, NV and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"Casey was great to talk to....Simply Communicates very well and they like to educate people as well which I find great. They also offer Maintenance agreements so you can properly take care of your air conditioning."
+12
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2012
Free estimates
Warranties offered
"A-Tech is the only air conditioning company I will ever do business with. Very professional, honest, and reasonable cost."
Serving Las Vegas, NV and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1974
Free estimates
Emergency services offered
"One hour air-conditioning is way better than any other company here in Las Vegas area. I would highly recommend them to do any of your air-conditioning work. My technician Timothy came out at 10:30 PM on a Saturday night and had my air-conditioning up and running within the hour."
+1
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Coming home from a vacation and finding out that my second level air conditioning is not working in early August in Las Vegas is not a good feeling. Called this company, MAC Tech and Marco was able to come and save the day. Both of our units are original so they're very old. He fixed it without unnecessary repair/replacement or upselling us. He gave his honest opinion and our expectations with our very old and tired AC units, which we kind of already knew. But he also gave us suggestions on how to keep it maintained to make it last a little longer. All that for a very reasonable fee. Fixing our air conditioning the same day we called Marco and giving us very valuable suggestions regarding our air conditioning is more than enough for me to confidently recommend this company and Marco to all our friends, family."
+222
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
Established in 2013, Pure Plumbing & Air has quickly earned a reputation as one of the most trusted plumbing, heating, and cooling companies in Las Vegas, Henderson, and surrounding areas. The family-run business offers high-quality plumbing and HVAC services for residential and commercial customers at reasonable prices. With expert technicians on their team, Pure Plumbing & Air can tackle any size or scope of plumbing and HVAC work, from general repairs and installations to complex jobs such as water and sewer line replacement and total air conditioning replacements. The Pure team is dedicated to building long-term customer relationships and is always willing to go the extra mile to ensure customer satisfaction. Pure Plumbing & Air uses only state-of-the-art equipment and environmentally friendly practices. Contact their office today to schedule an appointment or for any emergency services.
+7
Serving Las Vegas, NV and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
"Was very efficient. patient job Well done Will? have them service my air conditioning again 💯 percent With no doubt"
+85
Serving Las Vegas, NV and surrounding areas
Approved
Super Service Award Winner
In business since 2007
Free estimates
Emergency services offered
"couldn?t be more pleased with the service I received from Air Pro Master! From the moment I called, their team was professional, friendly, and incredibly responsive. They scheduled a same-day appointment and arrived on time, fully prepared to assess and repair my AC unit. The technician was knowledgeable, courteous, and explained everything in a way I could understand. He quickly diagnosed the issue and had it fixed within an hour?no upselling or unnecessary repairs, just honest, efficient work. What really stood out was their commitment to customer satisfaction. They followed up to make sure everything was working perfectly, and even gave me tips on how to maintain my system to avoid future issues. If you're looking for a trustworthy, skilled, and customer-focused HVAC company, I highly recommend Air Pro Master. They?ve definitely earned a loyal customer!"
+4
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"I've been using Johnny On the Spot for many years now and they have come through every time for me. They replaced my Air Conditioner and my Hot Water Heater and my Heater system to be at their best all the time. Every year they come and inspect them for $39.00 and keep them working so as to not have any emergencies! Yesterday Arturo Agundez inspected my Air Conditioner and Tony Castellanos inspected my Hot Water Heater. Arturo found my Air Conditioner to have no problems but he cleaned my filter and checked all aspects of it to be working great and found some things to be concerned about. Tony found a problem with my Water Heater Anode Rod and thankfully replaced it so I would have no emergency problem with it sooner than later. Both of them showed up on time and with their expertise I knew I was in good hands! I highly recommend Johnny On the Spot for their service as you will be in good hands I promise and I will continue to use them in the future."
+2
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2015
Free estimates
Warranties offered
Cosmo's Heating and Air Conditioning is a family-owned, locally operated HVAC company proudly serving Las Vegas, Henderson, North Las Vegas, and the surrounding desert communities. As "Man's Most Reliable," we treat every home like our own.\n\nWe handle residential and commercial heating and cooling of every kind, including air conditioning repair, installation, and replacement; furnace and heat-pump repair; professional duct cleaning; and indoor air quality services to keep your home's air clean and healthy year-round.\n\nOur team offers fast response and emergency service, certified technicians, and honest, transparent pricing on energy-efficient systems built to handle the desert climate. Join our Cosmo's Comfort Club maintenance membership for priority scheduling, exclusive discounts, and regular tune-ups.\n\nLicensed and insured, Contractor's License #0095036. Call (702) 960-5555 or book your free consultation online today. Every service is backed by Cosmo's Comfort Guarantee™.
+6
Serving Las Vegas, NV and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"All went well, and air conditioning working well."
+18
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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