Livermore Mechanical, Inc. is a Union Shop specializing in Residential and Commercial HVAC Service and Installs. We can handle any project or problem, large or small. Over the years, we have built our reputation on communication, honesty, integrity & quality of craftsmanship. We always strive for perfection & we get the job done right the first time. Call today to schedule a consultation!
"Great response time. They were able to replace parts the very next day. Oz was the tech, he was very professional and thorough. Megan was a delight to talk to and assure our needs were met.We highly recommend Livermore Mechanical"
Diane M on January 2021
Livermore Mechanical, Inc. is a Union Shop specializing in Residential and Commercial HVAC Service and Installs. We can handle any project or problem, large or small. Over the years, we have built our reputation on communication, honesty, integrity & quality of craftsmanship. We always strive for perfection & we get the job done right the first time. Call today to schedule a consultation!
"Great response time. They were able to replace parts the very next day. Oz was the tech, he was very professional and thorough. Megan was a delight to talk to and assure our needs were met.We highly recommend Livermore Mechanical"
Diane M on January 2021
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.
"They showed up on time and did the repair quickly and professionally. Because this is the second time in five years that compressor capacitor failed (note another company did first repair) he recommended a compressor and capacitor life extender kit. Came up with great price. "
Harry P on June 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.
"They showed up on time and did the repair quickly and professionally. Because this is the second time in five years that compressor capacitor failed (note another company did first repair) he recommended a compressor and capacitor life extender kit. Came up with great price. "
Harry P on June 2025
Air Concepts Mission Provide professional, trustworthy and responsive service to all of our valued customers.
"Very efficient. Found and fixed the issue quickly"
Carter H on July 2024
Air Concepts Mission Provide professional, trustworthy and responsive service to all of our valued customers.
"Very efficient. Found and fixed the issue quickly"
Carter H on July 2024
At MDP, we pride ourselves on our commitment to transparency, affordability, and exceptional customer service. Our certified technicians ensure every project is completed with the utmost professionalism and care, keeping your comfort and satisfaction as our top priorities. 📞 Contact us at (669) 400-6792 📧 Email: accounting@mdphvac.com 💻 Website: https://mdpheatingcooling.com/ 📜 California License #1103720. Our services include: ✅ Furnace and heat pump diagnostics and repairs ✅ Duct cleaning ✅ Expert HVAC system installation and maintenance ✅ Thermostat installation and optimization ✅ Free second opinions on previous HVAC estimates
"Project done."
Perry C on May 2025
At MDP, we pride ourselves on our commitment to transparency, affordability, and exceptional customer service. Our certified technicians ensure every project is completed with the utmost professionalism and care, keeping your comfort and satisfaction as our top priorities. 📞 Contact us at (669) 400-6792 📧 Email: accounting@mdphvac.com 💻 Website: https://mdpheatingcooling.com/ 📜 California License #1103720. Our services include: ✅ Furnace and heat pump diagnostics and repairs ✅ Duct cleaning ✅ Expert HVAC system installation and maintenance ✅ Thermostat installation and optimization ✅ Free second opinions on previous HVAC estimates
"Project done."
Perry C on May 2025
At Chill Heating and Cooling, we provide expert HVAC services tailored to your needs. From efficient installations to dependable repairs and maintenance, our skilled team ensures your indoor comfort all year round. With a commitment to quality and customer satisfaction, we deliver innovative solutions that enhance efficiency and save you money. Trust us to keep your home or business comfortable—your comfort is our mission!
"Victor did a great job repairing our aging HVAC system. I highly recommend him and Chill—very fast service."
David B on April 2025
At Chill Heating and Cooling, we provide expert HVAC services tailored to your needs. From efficient installations to dependable repairs and maintenance, our skilled team ensures your indoor comfort all year round. With a commitment to quality and customer satisfaction, we deliver innovative solutions that enhance efficiency and save you money. Trust us to keep your home or business comfortable—your comfort is our mission!
"Victor did a great job repairing our aging HVAC system. I highly recommend him and Chill—very fast service."
David B on April 2025
Welcome to Giant HVAC, Inc., we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project and we welcome your questions and concerns. Thank you for your interest. Please call us and find out why we are your number one HVAC company!
"Excellent work. They are super friendly and pretty knowledgeable. They explained everything to me with out being to technical so i could understand."
Ed L on January 2019
Welcome to Giant HVAC, Inc., we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project and we welcome your questions and concerns. Thank you for your interest. Please call us and find out why we are your number one HVAC company!
"Excellent work. They are super friendly and pretty knowledgeable. They explained everything to me with out being to technical so i could understand."
Ed L on January 2019
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
Dukes Heating & Air Conditioning is in HVAC business for 37 years now and continuously remains on the top of the industry. We do this by providing honesty and good workmanship that our customers love the most. We- Dukes Heating & Air Conditioning , also make sure that we have the latest technology that enables us to be more competitive & expert in the field and stand behind any work we have performed. Our in-house employees are all professionally trained and deliver only excellence to whatever project they work on.
"Great service"
Noah H on October 2023
Air Sharks LLC provides a wide range of HVAC services for residential clients throughout the South Bay. In addition to installing, repairing, and maintaining heating and air conditioning systems made by industry leaders like Daikin and Lennox, the company offers various services that are designed to improve indoor air quality, including ductwork inspection and cleaning. Owner Khaled Alsaka credits much of Air Sharks’ success to its passion for transforming the HVAC process with insightful education, collaborative solutions and top-tier products. “As a pioneering force in the industry, we leverage our extensive expertise to provide our customers with seamless guidance,” he says. “Our dedication to excellence motivates us to continuously exceed expectations, ensuring every interaction reflects our unwavering commitment to delivering five-star service.” Air Sharks offers personalized consultations so it can provide each job with tailored heating and cooling solutions, which Mr. Alsaka says is important for ensuring positive results. “We take great pride in our craftsmanship and attention to detail. Every phase of our process allows us to showcase our expertise, resulting in highly satisfied customers who are eager to share their experience with others.
"Very professional in both sales of the right product AND flawless and timely installation. You can stop your searching for vendors...stop sns start with Air Sharks."
Michael S on March 2025
Air Sharks LLC provides a wide range of HVAC services for residential clients throughout the South Bay. In addition to installing, repairing, and maintaining heating and air conditioning systems made by industry leaders like Daikin and Lennox, the company offers various services that are designed to improve indoor air quality, including ductwork inspection and cleaning. Owner Khaled Alsaka credits much of Air Sharks’ success to its passion for transforming the HVAC process with insightful education, collaborative solutions and top-tier products. “As a pioneering force in the industry, we leverage our extensive expertise to provide our customers with seamless guidance,” he says. “Our dedication to excellence motivates us to continuously exceed expectations, ensuring every interaction reflects our unwavering commitment to delivering five-star service.” Air Sharks offers personalized consultations so it can provide each job with tailored heating and cooling solutions, which Mr. Alsaka says is important for ensuring positive results. “We take great pride in our craftsmanship and attention to detail. Every phase of our process allows us to showcase our expertise, resulting in highly satisfied customers who are eager to share their experience with others.
"Very professional in both sales of the right product AND flawless and timely installation. You can stop your searching for vendors...stop sns start with Air Sharks."
Michael S on March 2025
Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!
"Still getting estimates."
Lucy H on June 2025
Albert Nahman Services was founded in 1981 and has been serving Berkeley, CA and it surrounding areas in all their plumbing and HVAC needs. Each of our technicians went through rigorous training so we can guarantee that you will be receiving the proper service. We are also insured and supply a warranty for our parts for five years and up to twenty years on an re-piping or sewer replacement. Call us now to make your appointment!
"Still getting estimates."
Lucy H on June 2025
It's often worth replacing your old thermostat with a newer model that can enhance your home's comfort and energy efficiency. Upgrading to a programmable or smart thermostat can save you up to $200 per year on energy bills. Plus, smart thermostats offer convenient features like remote control and learning capabilities, making your home more comfortable and easier to manage.
Signs of a bad thermostat include your HVAC system not turning on when it's supposed to or failing to reach the desired temperature. If the thermostat's display is blank or not functioning properly, it could be malfunctioning. Another indicator is the HVAC system running continuously without shutting off or cycling on and off too frequently. You might also notice uneven temperatures throughout your home, with some rooms being too warm or too cold. These issues suggest that the thermostat is failing and may need repair or replacement to ensure your HVAC system operates efficiently.
A thermostat should last between 10 to 20 years, depending on its quality and how well it's maintained. Over time, dust, wiring issues, and general wear can affect its performance. Even if a thermostat is still functioning after 10 years, you might choose to replace it to take advantage of newer energy-saving technologies and smart home integrations. Upgrading to a modern thermostat can improve efficiency, offer more control over your home's climate, and potentially lower energy bills.
The number of thermostats you need depends on your home's size, layout, and heating and cooling zones. In a standard single-zone HVAC system, one thermostat controls the temperature for the entire home. However, larger homes or those with multiple floors might benefit from multiple thermostats linked to a multi-zone HVAC system. This setup can offer better comfort and energy efficiency: It lets you customize the temperature in different areas, so you're only heating or cooling the spaces you're using.
Replacing a thermostat typically takes a professional technician about one to two hours to complete. If you're swapping out an existing thermostat for a similar model with compatible wiring, the process can be done in less than an hour. However, installing a new thermostat that requires additional wiring, such as a smart thermostat, or moving the thermostat to a new location can extend the time to two hours or more. Complex installations may also involve cutting into drywall or integrating with other home systems, which can add to the duration.
There are a few things that can cause your home thermostat to fail. The most simple one is age and cleanliness. Dirt, grease, dust, and other small particles can clog sensors and cause malfunctions in readings. You may also have a failing power supply and loose connections, and the simplest cause is that it isn't installed in the right place in your home so it can't properly sense air temperature. Repairing a thermostat costs around $210.