Serving Mission Viejo, CA and surrounding areas
Approved
In business since 1996
Free estimates
Warranties offered
"The owner Bill McIntosh was very friendly and professional. His crew did an excellent job of installing the new heating and air conditioning system. They were very efficient and cleaned up everything after they were finished."
Serving Mission Viejo, CA and surrounding areas
Approved
In business since 2002
Free estimates
Credit card accepted
"Temp Air personnel are responsible, honest, knowledgable, and their customer service is top of the line. They were accommodating with a scheduled that worked for us. Also, the techs that came to our house were professionals and answered all of our questions. I highly recommend them."
+14
Serving Mission Viejo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"Chris analyzed my entire AC and heating system and explained in detail the pros and cons of performing additional maintenance. I greatly appreciated his description of future potential issues and his recommendations on how to mitigate them. Thank you Chris."
+31
Serving Mission Viejo, CA and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Great guys really took the time to fully advise us on our options. We went with service, cleaning and small repair instead of new system. Can't be happier. System works great and really nice guys who take pride in a good job . My only options for ac work from now on is from Ahl air conditioning. Nice job guy's"
Serving Mission Viejo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2015
Free estimates
Emergency services offered
"Installed new AC and heat pump. Very efficient and professional"
+19
Serving Mission Viejo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"These are some of the nicest people you will ever meet. They are very professional & yet make you feel very comfortable to be with them. I would recommend them to everyone who needs air conditioning or heating help."
Serving Mission Viejo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Emergency services offered
Warranties offered
"I am so glad I did not try to install our new dishwasher myself. Joseph Rand came out from All City Plumbing. We had some difficult existing conditions and our technician finished the job fast, clean and made it look easy. When I call All City back to my home for another job I will request to have Joseph come out.."
+42
Serving Mission Viejo, CA and surrounding areas
Approved
In business since 2012
Free estimates
Credit card accepted
"The team that came out to replace our home ducting was awesome! They were friendly and knowledgeable. They left everything neat and clean. Would defiantly recommend!"
+7
Serving Mission Viejo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
"I was able to get a same day appointment and get my AC fixed quickly. Very professional. Highly recommend."
+6
Serving Mission Viejo, CA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Called in the morning, Bernie arrived in the afternoon and within 2 days we had a new AC unit located on the roof which requires a crane to install. I would highly recommend Air ASAP as you will not find anyone better nor any better price."
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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