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Central a/c service or repairers in Castro Valley
Hao Wu is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!
Hao Wu is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!
Thank you for choosing 411 Heating & AC, LLC, Contra Costa Countys premiere HVAC service professional. For nearly a decade, we've specialized in all your heating and air conditioning needs. We proudly serve Concord and the surrounding areas. We look forward to earning your business.
"Our heater broke and my husband is medically fragile and It was 58 degrees INSIDE. I needed help ASAP. He's 88 and I'm 77 and calling people was frustrating until I checked top Angie reviews for my area. Even then, two out of three failed on ability to respond in less than 7-10 days. Another said we can come assess in three days and then schedule your repairs. 411 came within hours and had us heating up with a brand new, quieter, and quicker system the next day! Can't thank them enough. And the pricing was very fair based on checking with others in our neighborhood and relatives who have had to replace their systems."
Linda M on February 2025
Thank you for choosing 411 Heating & AC, LLC, Contra Costa Countys premiere HVAC service professional. For nearly a decade, we've specialized in all your heating and air conditioning needs. We proudly serve Concord and the surrounding areas. We look forward to earning your business.
"Our heater broke and my husband is medically fragile and It was 58 degrees INSIDE. I needed help ASAP. He's 88 and I'm 77 and calling people was frustrating until I checked top Angie reviews for my area. Even then, two out of three failed on ability to respond in less than 7-10 days. Another said we can come assess in three days and then schedule your repairs. 411 came within hours and had us heating up with a brand new, quieter, and quicker system the next day! Can't thank them enough. And the pricing was very fair based on checking with others in our neighborhood and relatives who have had to replace their systems."
Linda M on February 2025
Pacific Coast Home Services is a client centered company, serving the greater Bay area community.. We're dedicated to providing full service, from skilled caring technicians, servicing your electrical, plumbing, heating ,Air ,and now bathroom and kitchen remodel . All these professionals come together come together to handle all your repairs, upgrades, installs,and maintenance, offering Home Protection Plans where our technicians come out twice a year to make sure your homes systems are safe and energy efficient.
"Pacific Coast Home Services charged me $450.00 on May 10th to have my Air Conditioner repaired. On July 1st when the heat wave hit San Jose my air conditioner did not work. Pacific Coast did not stand by their GUARANTEE and I had to call another company to do the repairs. Thankfully, they were an honest company and made the repairs. Pacific Coast Home Services consisted of their salesman wanting to sell me a maintenance agreement for $900 ... I should have realized at that point he was not interested in fixing my problem and asked him to leave my house !!! He did remove a few leaves from the air conditioner and clipped a few nips off a bush nearby ... there was no repair done for his billing me $450.00. I am 92 years old and feel this was ELDER ABUSE !!! DO NOT CALL THIS COMPANY!!!"
Nadine T on July 2024
Pacific Coast Home Services is a client centered company, serving the greater Bay area community.. We're dedicated to providing full service, from skilled caring technicians, servicing your electrical, plumbing, heating ,Air ,and now bathroom and kitchen remodel . All these professionals come together come together to handle all your repairs, upgrades, installs,and maintenance, offering Home Protection Plans where our technicians come out twice a year to make sure your homes systems are safe and energy efficient.
"Pacific Coast Home Services charged me $450.00 on May 10th to have my Air Conditioner repaired. On July 1st when the heat wave hit San Jose my air conditioner did not work. Pacific Coast did not stand by their GUARANTEE and I had to call another company to do the repairs. Thankfully, they were an honest company and made the repairs. Pacific Coast Home Services consisted of their salesman wanting to sell me a maintenance agreement for $900 ... I should have realized at that point he was not interested in fixing my problem and asked him to leave my house !!! He did remove a few leaves from the air conditioner and clipped a few nips off a bush nearby ... there was no repair done for his billing me $450.00. I am 92 years old and feel this was ELDER ABUSE !!! DO NOT CALL THIS COMPANY!!!"
Nadine T on July 2024
With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.
"Great customer service!"
John _ on March 2025
With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.
"Great customer service!"
John _ on March 2025
Eagle Air has been in business since 1993 and is a recognized authority in HVAC design, installation, repair, maintenance, and replacement of residential and commercial heating and air conditioning systems. Eagle Air offers equipment and certified professional service.
"Good"
Ani B on August 2024
Eagle Air has been in business since 1993 and is a recognized authority in HVAC design, installation, repair, maintenance, and replacement of residential and commercial heating and air conditioning systems. Eagle Air offers equipment and certified professional service.
"Good"
Ani B on August 2024
We are 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.
"Kolby was very professional, timely, extremely helpful, ! If you need help with HVAC issues, he's the one to call! He's fantastic!"
Debra C on January 2025
We are 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.
"Kolby was very professional, timely, extremely helpful, ! If you need help with HVAC issues, he's the one to call! He's fantastic!"
Debra C on January 2025
Providing HVAC and insulation services to the San Jose and surrounding areas since 2016, we have over 15 years of experience in these areas. We provide HVAC and insulation services to both residential and commercial clients. Our mission is to make your home more efficient by providing quality services at a reasonable price!
"I had an excellent experience.Jesse. Munez the tech arrived on Time.He serviced the unit and explained a few things to me.The booking procedure was very efficient and the office personnel is extremely friendly and accommodating. I highly recommend insulation Gurus."
Elisabeth S on November 2024
Providing HVAC and insulation services to the San Jose and surrounding areas since 2016, we have over 15 years of experience in these areas. We provide HVAC and insulation services to both residential and commercial clients. Our mission is to make your home more efficient by providing quality services at a reasonable price!
"I had an excellent experience.Jesse. Munez the tech arrived on Time.He serviced the unit and explained a few things to me.The booking procedure was very efficient and the office personnel is extremely friendly and accommodating. I highly recommend insulation Gurus."
Elisabeth S on November 2024
Smart Heating and Air is proud to be a locally owned and operated business that provides residential HVAC installation, replacement and service. With years of experience and unmatched expertise, we can help with any and all of your heating and cooling needs. Since opening our doors we have built our business on providing customers with the highest quality products and service at a fair price. You can count on us to be timely, tidy and when the job is done, that you will be 100% satisfied with the work. Let us show you the Smart Heating and Air advantage, get in touch today!
"They do an outstanding detailed job on examining your equipment and explain the problems that are going on and problems that might arise and then back it up with pictures. They send all this info to you via your computor. They also do a great job cleaning up after they are finished. They are very professional!"
marilyn m on April 2024
Smart Heating and Air is proud to be a locally owned and operated business that provides residential HVAC installation, replacement and service. With years of experience and unmatched expertise, we can help with any and all of your heating and cooling needs. Since opening our doors we have built our business on providing customers with the highest quality products and service at a fair price. You can count on us to be timely, tidy and when the job is done, that you will be 100% satisfied with the work. Let us show you the Smart Heating and Air advantage, get in touch today!
"They do an outstanding detailed job on examining your equipment and explain the problems that are going on and problems that might arise and then back it up with pictures. They send all this info to you via your computor. They also do a great job cleaning up after they are finished. They are very professional!"
marilyn m on April 2024
Remodeling business locally owned and operated we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!
"Jonathan is meticulous and methodical, not to mention kind. The work was excellent and professional. I would hire again."
Brian M on April 2025
Remodeling business locally owned and operated we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!
"Jonathan is meticulous and methodical, not to mention kind. The work was excellent and professional. I would hire again."
Brian M on April 2025
We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Service was great. We had to replace the upstairs ac unit. I heard of his awesome reputation as hvac from a friend. Gave him a call, he came as soon as possible,replaced what needed to be fix. Next you know I'm chilling inside my house with ac blasting cool air. Thanks for your services."
Jerry n on August 2024
We specialize in all phases of heating and cooling services, installs, repairs, maintenance, and more. We pride ourselves on the quality work we provide, while delivering great customer service. Check out all the services we offer below and call -or- click to schedule a free estimate today!
"Service was great. We had to replace the upstairs ac unit. I heard of his awesome reputation as hvac from a friend. Gave him a call, he came as soon as possible,replaced what needed to be fix. Next you know I'm chilling inside my house with ac blasting cool air. Thanks for your services."
Jerry n on August 2024
Central a/c service or repairs FAQs
An evaporator coil is a crucial component of your air conditioning system, responsible for cooling the air inside your home. It absorbs heat from the indoor air, allowing the system to blow cool air through your vents. Keeping your AC well-maintained helps it run efficiently and can save you money on energy bills.
AC condensers can present a variety of common problems, including dirt and debris accumulation, drain blockages, and water leaks. Leaking refrigerant, faulty electrical components, damaged coils, and burnt-out motors can indicate more complex repair needs.
Some of these issues can be easily fixed, while others may require a total unit replacement. For the most accurate assessment, contact an AC contractor in your area.
The AC coils typically last the lifetime of your system, ranging from 10 to 20 years, depending on factors such as maintenance, quality, and other variables. Have your AC condenser coils inspected and cleaned periodically to maximize their lifespan and optimize cooling performance. Ask your HVAC pro for recommendations on how to stay on top of all critical AC maintenance.
Home warranties cover AC coils when the policy explicitly protects key HVAC components. This means that if an AC coil fails under the scope of your warranty, repair or replacement expenses are covered. Your warranty documentation confirms whether coil repairs are included, and manufacturer warranties protect both the AC condenser and its coils. It is important to review your contract details to know your exact coverage.
Warning signs that your AC condenser is failing include noticeable fluid leaks and loud, unusual noises. These indicators confirm that the condenser is under stress and its performance is compromised. Decreased cooling efficiency, uneven indoor temperatures, and increased energy consumption further signal that the unit is deteriorating. Recognizing these signs ensures you engage a professional for a thorough evaluation and prompt repair.
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