Get matched with top thermostat installers and replacers in El Cerrito, 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"

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.

"The first person came to do this job but left many pieces out of the installation. He did such a poor job of mounting the 55" TV that it began leaning lopsided! Gilbert came to undo all the first person messed up. Gilbert assembled and mounted my 55 inch TV on a large stand that he had to put together again correctly after taking down the awful job done by Diego. Gilbert had no problem with the complex instructions and did a fine job even going out to get screws that had been inserted incorrectly. Gilbert was professional and worked quickly. I would use him again without hesitation."

"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."

"They were prompt. Efficient.knowledgeable, helpful.professional and friendly. It was a pleasure to wirk with Edgar and they did a wonderful job. When he cane for the estimate he educated me on how to choose my ceiling fan and emwhat was involved. Made the whole process easy. They will be my electricians for all my future electrical work. Five stars!"

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.

"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…"

"Project went fine. Richard was very professional and accommodating!"

"Ilan Yosef and IY Development took my dream kitchen from concept to reality! The attention to detail, from custom cabinetry to the flawless installation of countertops and backsplashes, was top-notch. Ilan kept me updated throughout the entire renovation process, and the team s professionalism and craftsmanship were outstanding. I m thrilled with the outcome â it s like cooking in a magazine-worthy kitchen! Highly recommend Ilan for anyone looking for a high-quality, stress-free kitchen remodel."

"They installed copper pipes for my water heater. They were recommended to me by a family member and I was not disappointed. They made sure to update me frequently and even gave me some input. They do great work ."