Serving Walnut, 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 Walnut, CA and surrounding areas
Approved
In business since 1988
Free estimates
Warranties offered
"The service I received from Air-Tech was above my expectations. Alex made the selection process effortless and the installation was fast and efficient. The folks with Air-Tech are real pros."
+8
Serving Walnut, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"Anthony and Brandon at MSP Heating and Air Conditioning were incredibly helpful, even though they couldn?t service our water source heater. They took the time to assess the system, explained the situation clearly, and didn?t just leave us hanging?they recommended two other companies and even made a call to one of them on our behalf. It?s rare to find that kind of genuine care and effort, and while they couldn?t help us this time, we?ll definitely reach out to them for any future needs. Thanks again, Anthony and Brandon!"
+67
Serving Walnut, CA and surrounding areas
Approved
In business since 2002
Free estimates
Credit card accepted
"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"
+14
Serving Walnut, CA and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"Bill Walker is the tech that diagnosed my faulty condensing unit compressor to be grounded. Sounds like a good thing right? but its not. You never want to hear that. Should you ever do so you want Trabuco Air handling it. I was explained what was wrong and given options that i could comfortably choose from without just breaking the the already shaking bank. Trustworthy and reliable Bill is a cool cat and confident in his skill set. He knows air conditioning extensively and will solve your needs as well. I can finally enjoy the upstairs again thanks to Bill from Trabucco Air."
Serving Walnut, CA and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"They were very professional, on time, took the amount of time they said it would, and cleaned up afterwards. The ac is great"
+3
Serving Walnut, 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 Walnut, CA and surrounding areas
Approved
In business since 1990
Free estimates
Emergency services offered
"Ray is very professional, and provided options for my air conditioning unit replacement. Ray went out of his way to replace a small gas line leak that he found. He also drove to Anaheim early on Saturday morning to pick up a part that was needed for the AC unit, and came over to install it so that I would have the air conditioner available for the upcoming heat wave this week. He and his team were on time, and considerate during the installation process. I highly recommend RS Air Conditioning & Heating."
+2
Serving Walnut, CA and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"Very professional and knowledgeable. Was very honest with what needed to be fixed. My until was making a noise and the technician came out and fixed the problem. I highly recommend Easy Air"
+4
Serving Walnut, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2009
Emergency services offered
Warranties offered
"Changed out our water heater and a awesome job! Gabriel the tech did an outstanding job!"
+42
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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