Serving Sun Valley, CA and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"My experience with heating and air conditioning repair, replacement, and new installation was excellent. Their staff was amiable, well-informed, and meticulous. Our device is operating more efficiently than before. Really trustworthy service!"
+24
Serving Sun Valley, CA and surrounding areas
Approved
In business since 1988
Free estimates
Warranties offered
"My interaction with Air-Tech went very smoothy. Alex Fish, the customer representative was very professional and easy to work with. He provided a clear and detailed proposal , with options, before leaving the site on his first visit. Alex stayed in communication throughout the project. As a result of this experience I plan to have Air-Tech take over the maintenance on my main HVAC system."
+8
Serving Sun Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2006
Free estimates
Emergency services offered
"The technician arrived timely, performed the work expertly and the fee for service was reasonable. I would highly recommend this company for air conditioning service. Theresa S. Valencia, Resident"
+6
Serving Sun Valley, CA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"I live in tarzana In this area it’s very hard to find good ac service. Mario and his company mor air probably the best in the business. Great prices. Great people and great service."
+13
Serving Sun Valley, CA and surrounding areas
Approved
In business since 1967
Free estimates
Emergency services offered
"Arrived on time and fixed the problem. A bit more expensive than I would have liked but checking around probably not much more than elsewhere and our air conditioner was fixed same day in the middle of a heat wave."
+10
Serving Sun Valley, CA and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
"My air conditioner was not working properly haroon show up after diagnose he change the capacitor and did clean up the unit working prefect"
Serving Sun Valley, CA and surrounding areas
Approved
In business since 2019
Free estimates
Warranties offered
"New ac heating job done as promised, on time. Good quality. Kept floor protected. Vaccuumed upon completion. Knowlegeable workers. Highly reccomend. Samuel"
+87
Serving Sun Valley, CA and surrounding areas
Approved
In business since 1994
Warranties offered
Credit card accepted
"Ask for Gary. He is the best HVAC technician."
Serving Sun Valley, CA and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"I really appreciate Greg from Progressive Air inc ? honest, skilled, and reliable. Our air conditioner system works perfectly now. Highly recommend them for any HVAC needs!?"
Serving Sun Valley, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"Brandon came out on a Sunday and looked over the job site for details needed to present an estimate. Within a day I had the estimate with 3 options from low to high, all of which were reasonable the only difference being what equipment I wanted to install. Option #1 and #2 were lower end brands that were less expensive but since the difference in price betwee Option #1 and Option #3 was about $1400, I went to Option #3 which was their top tier brand, Carrier that clearly is an industry leader and trusted brand for longevity. I was installing a SINGLE ductless to cool a standard bedroom size room with a 18,000 BTU unit. The job took a total of about 5 hours since they were mounting the unit in a second floor bedroom and they needed to run the power/refrigerant lines two stories down to the compressor mounted on the wall. Everyone from Office Staff Jim to installers were absolutely wonderful to deal with. You can trust this company."
+14
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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