Serving Lafayette, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"Fast and available when i needed them in a pinch. Sam did and amazing job! He listed out my options and walked me through each solution to get my air conditioning in working order ago. Would use this company again"
+27
Serving Lafayette, CA and surrounding areas
Approved
In business since 1993
Free estimates
Emergency services offered
"I had 2 other companies come in prior to Eagle Air . Eagle Air was much better than the other companies from start to finish The office staff/ technicians/ Estimators and installers were the very best. We highly recommended this company."
+1
Serving Lafayette, CA and surrounding areas
Approved (Corporate)
In business since 2024
Free estimates
Credit card accepted
When your air conditioning or heating isn't functioning in your home or office space, Big Air is here to help. Our expert HVAC professionals regularly provide air conditioning and furnace repair services to homeowners and businesses throughout Concord, California, and the surrounding areas.\n\nWe're ready and equipped to diagnose the cause of any air conditioning or furnace issue you might have and come up with the perfect HVAC solution that meets your needs and budget.
+2
Serving Lafayette, CA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"Global Comfort installed a full HVAC system in my home; 7 new runs for air, new AC unit, new furnace and a new Nest thermostat, all electrical needs. Rudy and his team are respectful, efficient, punctual, competitive in pricing. Rudy walked me through running the system for its first time and explained all the stuff for a brand new system in a house that never had AC. I'm very thankful for the work they did. Highly recommend because their customer service is top notch."
+9
Serving Lafayette, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Emergency services offered
"411 Heating and Air came promptly and did great work very quickly."
+3
Serving Lafayette, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2020
Free estimates
Warranties offered
"I highly recommend this company to do your heating and air conditioning project. John Alanis and his crew did an excellent job and the pricing he gave us beat the competition. Thank you John and I’ll make sure to spread the word to my friends and relatives."
+4
Serving Lafayette, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2016
Free estimates
Emergency services offered
"I m thrilled with David Mendoza, Shane, and the entire crew. The crew was professional, knowledgeable and fun to work with. For the first time in 25 years the entire house has a uniform temperature! They cleaned the house when finished! I have no reservations in recommending Perfect Star Heating and Air Conditioning and David Mendoza s team. Outstanding work."
+8
Serving Lafayette, CA and surrounding areas
Approved
In business since 2021
Credit card accepted
At TRIO Heating, Air & Plumbing, our mission is clear: to provide top-tier heating and air conditioning services while focusing on exceptional customer experiences, employee happiness, and environmental responsibility. We are dedicated to delivering outstanding service that ensures our customers are satisfied and our team is motivated.
+32
Serving Lafayette, 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.
Serving Lafayette, 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!"
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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