
Serving San Leandro, 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 Leandro, 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 Leandro, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"Smart Heating and Air Conditioning was very responsive and came out when we really needed them. We were without heat as our old furnace no longer worked and our AC was on its last leg. Mike came out to give us a quote which was the best out of three that we had. He went over all options with us and now we are very satisfied to have a new and efficient heating and AC system. They lived up to their name as well, by upgrading my thermostat to a WiFi one that added that SMART touch to my system."





+27

Serving San Leandro, CA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"To start, I put in for an emergency call to Freschi and was told they would call me 30 minutes before. They never called me back. Freschi sucks!!!I I also put in a request on HomeAdvisor on Thursday night and was given Global Warming Heating and Air as one of their verified contractors. I got a call at 7am from Rudy. I called back around 830am and we made an appointment for 1130am. He showed up at 1105am and quickly diagnosed the problem. He recommended replacing the furnace(which houses the blower assembly) due to the cost of repairs and its 17 year old condition. He didn t try to up sell me for an entire new system. He said my AC is working well so there s no need to replace it. I decided to replace the furnace and he said he d be back around 130pm. Rudy and his crew were back by 1pm. From the start of demo to it running again was less than 2 hours. Rudy s customer service is top notch!! From now on, I will only be calling Global Warming Heating and Air. I can t say enough good things about Rudy s business ethics and timeliness. A+++++"





+9

Serving San Leandro, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"They came out quickly. Did the job properly replace the heating and air-conditioning unit very happy with their work and the price I would recommend them to anyone."





+14

Serving San Leandro, CA and surrounding areas
Approved (Corporate)
In business since 1981
Free estimates
Warranties offered
"The crew from Albert Nahman did a great job from start to finish. The project was to replace the original ductwork in our 60 year old house. Tom provided excellent advice for the estimate then Bryan’s crew did the job, 2 days, within a week of my acceptance of the proposal. Great work."





+73

Serving San Leandro, CA and surrounding areas
Approved
In business since 2019
Free estimates
Emergency services offered
"I recently had a new air conditioning system installed, and I couldn?t be happier with the entire process. From the initial consultation to the final installation, everything was handled professionally and efficiently. The team arrived right on time, explained all my options clearly, and helped me choose the best system for my home and budget. The installation was completed faster than I expected, and they made sure everything was clean and working perfectly before they left. Thank you for a job well done!"





+4

Serving San Leandro, CA and surrounding areas
Approved
In business since 1953
Free estimates
Warranties offered
"Jaleel Porter from Bell Brother's Heating and Air, Inc. came to the house to install and trouble shoot the installation of two Ecobee Thermostats. We prepaid Best Buy's Geek Squad to installed them but their electrician was not able to install them properly. The job was abandoned by Geek Squad leaving some HVAC wiring mixed up and at least one wire was not connected properly. Jaleel Porter was courteous and has represented his company extremely well. He came wearing protective mask and shoe coverage. He was knowledgeable about the product that he installed. He was also informative about any general and specific HVAC questions and maintenance issues. Moreover, he was also punctual and cordial in communicating how the service works. He was also patient and helpful in teaching us the settings and operations of the system using our apps. He did not leave the premises until everything was functioning properly. Finally, There were no "surprises" and the price was reasonable and competitive."





+17

Serving San Leandro, 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 Leandro, 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 Leandro, CA and surrounding areas
Approved (Corporate)
In business since 1999
Free estimates
Credit card accepted
Since 1999, Hassler Heating and Air Conditioning has helped East Bay homeowners stay comfortable with energy-efficient heating and cooling solutions built to last. We specialize in full system replacements, heat pumps, ductless mini-splits, and high-performance home upgrades designed to lower energy costs and improve year-round comfort.\n\nHomeowners choose Hassler for honest recommendations, expert system design, and clean, professional installations. Whether you need a fast repair or a complete system upgrade, our team focuses on long-term solutionsnot quick fixes.\n\nServing Alameda, Contra Costa, and Marin counties, were committed to doing the job right the first time, with quality workmanship you can trust.\n\nCall today for expert service and a smarter, more efficient home.
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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