Serving South San Francisco, CA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"We chose repair of a very old air conditioning unit due to the cost of a new unit. It is working now but we have no guarantee of for how long. Global responded quickly and repaired the unit within hours."
+9
Serving South San Francisco, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"Air Sharks are very professional and I think they did a good job on installing HP HVAC in our property."
+22
Serving South San Francisco, CA and surrounding areas
Approved
In business since 2003
Free estimates
Credit card accepted
"Alex was prompt, professional and clean. He took the time to educate me about my heating and air conditioning systems and provided me with good advice about maintenance and things to be aware of if my systems failed. Thank you for recommending this company to me."
Serving South San Francisco, CA and surrounding areas
Approved (Corporate)
In business since 1981
Free estimates
Warranties offered
"Said fixed the leaking pump but noted that there were some hazardous conditions caused by the way the unit was originally installed. Suggested that I call PG&E for a safety inspection. Did so and they confirmed that there were indeed small gas leaks due to faulty and ancient installations. PG&E did repairs and I am getting proposal for repair of the 90 year old gas lines. Really appreciate Said's thoroughness and honesty. Could not recommend anyone more highly!
"
+73
Serving South San Francisco, CA and surrounding areas
Approved
In business since 1978
Free estimates
Warranties offered
"Jim's Air Systems had the best value for my dollar. They supplied me with better equipment than they quoted for the same price. They completed the entire installation in about five hours. They protected my floors with tarps and were very careful to protect my walls as they moved equipment in and out. Josh, the son of the original Jim, was on the job working with the other two installers. They performed above my expectations. They left my home and yard as clean as if they had never been there. The new furnace is wonderful and is already saving me money on my P.G. & E. bill. I would recommend Jim's Air Systems unconditionally to anyone in need of a new furnace and AC system. This is a family business that has been supplying and installing systems since 1976. They take personal pride in doing an excellent job. They did not sell me anything that I did not need and provided me with a much cleaner and easier-to-service installation than my existing system. They are the best!"
Serving South San Francisco, CA and surrounding areas
Approved
In business since 2016
Free estimates
Offers commercial services
"I was so pleased with this company! Victor came out at 9:00 on a Wednesday night, determined that I needed a part for my AC, said he anticipated it should be in by Friday. What do you know...on Thursday at 6:00 p.m., I received a call saying a technician could install the part. By 7:00, voila, I had air conditioning!!! Jorge told me Victor absolutely impressed upon him that I needed AC...tonight. Many thanks for the prompt, friendly service and detailed explanations. Yes, I would wholeheartedly recommend this company of conscientious, responsive professionals!"
Serving South San Francisco, CA and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
"My job was cleaning of Air Ducts and dryer vent which is not on the drop down list provided. I spoke with several companies to see about quotes and scheduling. a clean out for my dryer vent before I had a new dryer installed. Silicon Valley Air Experts called me right away, listened to the job and provided a transparent initial assessment and cost estimate. While talking to them I also learned about cleaning all the air ducts, which I hadn't done in some time. They showed up on time, completed all of the work efficiently and cleaned up afterward. I plan to use them again in the future. It was a wonderful experience."
+4
Serving South San Francisco, CA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
Full service Home Maintenance & Repair. Specializing in painting, flooring and bathroom/kitchen remodeling. Electrical, plumbing etc. Licensed General Contractor\nLicense #1088129
+136
Serving South San Francisco, CA and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
IRBIS Heating Air Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.
+43
Serving South San Francisco, CA and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1953
Free estimates
Emergency services offered
"I needed to have techs come back to fix 2 issues after the install, one was a loose wire connection going to the fan asm. and the other was a rain / water leak from the roof hood covering the air input / exit. In both cases, the techs found and fix the issues in a timely manner and their troubleshooting was spot on¦. The install did take time but it was impressive to watch them remove a 40 years old unit and install a new one.¦"
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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