Serving San Lorenzo, CA and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"We like them, they are very good. They are going to do our air conditioning."
Serving San Lorenzo, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"The team at Smart Heating & Air Conditioning are second to none. Quality work and amazing customer service. Would recommend everyone to them for your heating and A/C needs!"
+27
Serving San Lorenzo, 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 San Lorenzo, CA and surrounding areas
Approved
In business since 2025
Free estimates
Emergency services offered
*****669-669-2435*****We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.
+2
Serving San Lorenzo, 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 San Lorenzo, CA and surrounding areas
Approved
In business since 1953
Free estimates
Warranties offered
"Replaced furnace and added air conditioning. Great experience from beginning to end. Highly recommend ABC."
+17
Serving San Lorenzo, CA and surrounding areas
Approved
In business since 2022
Free estimates
Offers commercial services
NUR HVAC, Inc. 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.
Serving San Lorenzo, CA and surrounding areas
Approved
In business since 2012
Free estimates
Warranties offered
At Art of Comfort, we believe every homeowner deserves a reliable, comfortable home — and a contractor they can trust. As a locally owned and operated company founded in Pleasanton in 2012, we've spent over a decade earning the confidence of Tri-Valley families through honest work and consistent results.\nWe're proud to be Diamond Certified, a distinction earned through rigorous quality verification and consistently high customer satisfaction scores.\nOur HVAC services include repair, installation, and maintenance for heating and cooling systems, as well as duct repair and replacement. Whether your system has broken down or you're ready for an upgrade, our experienced technicians are here to help.\nWe serve Pleasanton, Livermore, Dublin, Danville, San Ramon, Walnut Creek, Pleasant Hill, and the surrounding Tri-Valley area.
Serving San Lorenzo, CA and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
We have a 10 year experience in Handyman work, serving all around the bay area. We will always put in all our effort to give our costumers 100% satisfaction. We like to build good relationships with our customers. We do free estimates with no obligation to proceed.
+74
Serving San Lorenzo, CA and surrounding areas
Approved
In business since 2007
Free estimates
Customers say: True professional
We do just about any type of landscaping jobs and have been in business for 13 years.
+92
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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