Get matched with top thermostat installers and replacers in Walnut Creek, CA

"My cooling system is about 40 year old, but it started to need more pressure when it was turned on, and my heated needed a cleaning and a minor maintenance, so I had Perfect Star do an analysis to see how my two machines were doing. After a review was conducted, by flowing the panel requirements, both heater and cooling system needed to be upgraded. The new system is a Lennox. The cooling system has more ventilation than my previous one. The heater is only 14 inches across. I also have a smart thermostat which can be operated by phone or by touch. I am reading the manual so I can operate my preferred settings. Overall, I am pleased with my new system and with the workers that can to install the system. Thank you"

"Josh helped set up my AC unit . He is very professional and very detail-oriented with his installations. I will definitely call him up again when I need some home repairs/installations done. Very happy with his work!"

"My AC stopped working last November, and since then i had 4 contractors i called to fix it, i was turned down by everyone. i called Tyndall and peter came out and talked about it with me, actually troubleshot it, and 2 days later had parts and fixed it. i would give them 6 stars if i could. im so glad to have my ac running again. my recommendation, if you want something done, call Tyndall, because the rest of the contractors seem to just say its not fixable and leave without even looking at it. these guys were the first people that listened, then looked at the unit before declining service, and then actually fixed it. 10/10 great job and thank you."

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers? needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Very happy with my screen repair. Was able to install pet friendly screens in two patio doors and a bedroom window for a reasonable price. Highly recommend. Communicative and available within days of my inquiry."

"Will hire them again for future projects. Did a thorough job on our project and was able to bring one of our fixtures up to modern standards."

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 solutions—not quick fixes.\n\nServing Alameda, Contra Costa, and Marin counties, we’re 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.

R Maintenance\n\nAbout Us At R Maintenance , we pride ourselves on delivering top-notch home repair and maintenance services.\n\nOur Services\n\nPlumbing\nElectrical Work\nCarpentry\nPainting\nGeneral Repairs\nWhy Choose Us?\n\nExperienced and Skilled: Our team has the expertise to tackle any job, big or small.\nReliable and Trustworthy: We show up on time and complete the job to your satisfaction.\nAffordable Pricing: We offer competitive rates and free estimates.\nCustomer Satisfaction: Our work is guaranteed, and we have numerous positive reviews from happy clients.\nContact Us\n\nPhone: (925) 956-3017\nEmail: aaronrivassr@rivasmaintenance.com\nWebsite: www.rivasmaintenance.com

Miller’s HVAC is Livermore’s trusted choice for reliable heating and air conditioning services. Our certified technicians provide expert installation, repair, and maintenance for furnaces, air conditioners, heat pumps, and duct systems. We’re dedicated to keeping your home or business comfortable year-round with honest pricing, quality workmanship, and exceptional customer service.\n\nWe proudly serve Livermore, Pleasanton, Dublin, and surrounding Tri-Valley areas. Whether you need an energy-efficient upgrade, seasonal tune-up, or emergency HVAC repair, Miller’s HVAC delivers fast, dependable results you can count on.\n\nServices include:\n• HVAC installation & repair\n• Furnace & A/C maintenance\n• Indoor air quality solutions\n• 24/7 emergency service\n\nCall Miller’s HVAC today for a free quote and experience the comfort you deserve!

"Service request was to replace an old thermostat with owner-provided Ecobee Premium thermostat for Hydronic HVAC Heating system only. Tech was able to troubleshoot and make the smart thermostat to work, which involved wiring configuration. Fast, efficient, and professional service. Highly recommended…"