Heating & Air Conditioning / HVAC near Diamond Bar

“I cannot sing enough praises for McMaster Mechanical. I work with many contractors so I know how hard it is to find someone who is reliable and competent. Bryan has went above and beyond in every job he has done for us. He does not hire other workers cheaply to do the job for him like I've had other contractors do; He makes sure that the job is done correctly himself. I have found Bryan to be forthright, honest, skilled, proficient and professional. He will explain the job to you and what it entails and keep communication with you until it is done. His expertise and transparent communication gave me genuine peace of mind throughout the entire process. Thank you McMaster Mechanical“

“Fenco just installed the Lamborghini of air conditioning Carrier 5 ton and 4 ton variable speed. And I love it! Kamal is very thoughtful thorough and meticulous. Fenco will take very good care of you.“

“We had a great experience with the J Martin installation team. Jacob, Luis, and Abraham worked hard and long to complete it and it fired up in the first try. We are looking forward to keeping real cool this summer.“

“Max and Ivan arrived on time and quickly identified the issue with our AC. They immediately recommended a solution that got it working again. The whole transaction was smooth, and their explanation was clear and easy to understand. We highly recommend their service to our friends and family.“

“Haven takes care of my home and office. We had an emergency need at my dental office and they came out the next morning and immediately found the problem and fixed it! Can’t tell you how much I appreciate that. And their team was friendly and professional and cleaned up when they were done. 5 stars ⭐️“

“Great service! I had an issue where my HVAC was only blowing warm air. They came out the same day, quickly diagnosed the problem and fixed it at a very reasonable price. Other companies charge me service fee and quoted much higher prices for the repair. Im very happy with their fasr response, honest pricing, and excellent service. I highly recommend them.“

“Installed a Stealth Pro 3.3 in a couple of hours, showed me how to use the system and went over the manuals and warranty. Friendly and knowledgeable installers that laid down tarps to protect the floor and vacuumed when they were done. I highly recommend Eco Air Solutions.“

“Friendly, good service. Electrical panel maintenance - new breakers, cleaning up wires, bus bar, and re-labeling/testing all circuits.“

“Thank you for fixing my AC system. Steve K accurately diagnosed the problem. Yesterday, technicians Jonathan and Jose Camacho fixed my AC system to my satisfaction. They were professional, respectful and diligent in their work. I am happy and satisfied. Thanks to Service Lion plumbing and AC.“

“Victor was amazing he explained everything and had my AC up and running in no time! Highly recommend.“

“Tim was amazing with the service and he was in out within a short amount of time! I would give 10 stars if I could ???“

“July 13, 2026: we discovered a leak in the water valve assembly to our refrigerator ice maker and we had a leaking outside spigot that we tried to fix (bad idea) and caused the spigot to blow off the pipe, forcing us to turn off the main water supply. So we called Steve’s. Sean arrived only about an hour after we called, assessed the situation, obtained the parts, and completed the jobs quickly. We are so grateful for Sean’s professional work and friendly service.
June 24, 2026: we had four different plumbing services performed: new one-handle bath/shower hardware including drain, shower head and spigot, installation if new main water service build up valves (outside), repairs to leaking pipes from second story bath/shower, and shut off valve and supply to all three toilets. A great team of Andrew, Will and Kaleb completed all of this extensive work in one day. All three gentlemen were friendly, neat and professional with their work. The jobs were done right and they cleaned up the work areas very nicely. The annual Steve’s membership saved us quite a lot, as the services were discounted.
February 2026: Work done: remove old water heater and install a new tankless water heater, along with all the water lines and electrical connections. Sean worked hard to get all this done in a day and the system works great! The tankless system is the better choice than the old type water heater, which had burst at a seam and sprayed hot water into our house and garage. Thanks to Sean’s great work, we can rest assured that we have a reliable hot water supply without worrying about another flooding incident.
Fall 2025: Matt was prompt, friendly and efficient. He explained the process of checking the A/C system, indicating that the key components were working at optimum levels. Very happy with Matt’s service. This was first visit for an annual maintenance contract.“

“Max from Metz was very good and explained the issues at hand and possible solutions and cost. Would highly recommend Metz and Max again.“

“Isiah did an excellent job explaining what the problem was and the estimated price of the repair. I opted to simply contact the landlord and have them handle the situation from here...GEJ“

“Dale Skinner arrived at the time premised and provided excellent information about my plumbing needs. I really appreciate the honesty. Marathon plumbing was clear about my needs and will be someone I call in the future.“

“Marco was quick, professional, and had great attention to detail! Highly recommended!“

“Ray was very professional and thorough in explaining every process in detail. Ray is definitely an asset to Accurate Comfort.“

“The fan in my air conditioning compressor stopped spinning and I feared the worst but Mark inspected it and said he could fix it and even had the part on his truck to do so! I was so relieved! My air conditioning was up and running in no time! I was very happy with the quick and efficient service!“

“Great job with great equipment. Great installation, fast and clean! Great customer service.“

“Edward Pineda showed up to my house to address my AC concerns. He was extremely professional, helpful, friendly and addressed all of my questions. He fixed the problem in a timely manner. I highly recommended Edward and Canyon Air for any HVAC issues ir concerns. Thank you“

“Brandon is a great technician and went above and beyond helping us with a rodent problem he discovered while servicing our unit“

“Alex was polite and patient. He made sure we understood the reason for his recommendation for the thermostat replacement. He made it easy for us to understand every feature.“

“Dominic Greep came to my home right on time. He was professional, courteous and friendly. He looked at the hot water tank and knew where the problem was. After fixing it he waited to see that the problem was not recurring and made sure I’ll have hot water the next day.

I would not trust any other company with my HVAC or plumbing needs.“

“Albert Air was top notch. Nick the salesman was very courteous, knowledgeable and very professional. He communicated daily and was available anytime we called and always checked in with us. Their installation was done in 1 day in half as promised. Very clean installation no mess left. Nick was very hands on which we appreciated. I would definitely recommend this company.“

“I called Marvel Air Conditioning at 4:00 PM on the Friday of Memorial Day weekend. They sent a technician out who diagnosed the problem (correctly!), got the part and had our system up and running by around 5:30! The service was exceptional and I highly recommend this company!!“

“Booked appointment and they arrived that same day! Super fast service for my AC and were affordable and transparent with their prices!!! Thank you so much for all your help!“

“I had a great experience with The Comfort Zone. During a routine maintenance visit, their team noticed that my system was missing a secondary drain pan, something I hadn’t been aware of. They quickly provided a clear quote and worked with my schedule to set up a convenient installation time.
Jim Heflin went above and beyond throughout the process. He reached out ahead of schedule to let me know he was available earlier, which I appreciated, and completed the installation efficiently. What really stood out was his knowledge of my system, he had actually installed the split unit in my garage for the previous owner and was able to share helpful background and insights.
I highly recommend Jim and the entire team at The Comfort Zone for their professionalism, responsiveness, and expertise.“