Get matched with top central a/c service or repairers in Diamond Bar, CA

"Pedro was very professional, very knowledgeable, and explained his actions and rationale every step of the way. I was so impressed with the service I already recommended them to others. Pedro really loves what he does, and it really shows. Not only did I get my AC the customer service was top notch."

"Michael arrived to fix our main water line after it ruptured. He was able to quickly replace the main riser and also had time to take care of a couple other repairs around the house that needed attention. Great service."

"Prompt and efficient service. Very thorough in explaining the process. Friendly technician! Would recommend and use again (hopefully not for the same issue)."

"I’m so glad I called HD mechanical to have my thermostat fixed. We set a time to meet up and he was there on time and very professional. He was very thorough with his work and explained to me all the work he performed. He even checked and serviced my unit, showing me that my filter needed to be changed. Would definitely recommend to anyone who needs and service/repairs done."

"It was over 90 degrees outside and the A/C was not blowing cold air. I called and explained it was for my 85 year old mother who was in home Hospice with end stage Parkinson's. I was worried she may get a heat stroke. They scheduled a service tech to visit in a timely manner. The service tech called an hour before the scheduled appointment to let me know he was on his way. Mark (service tech) was very professional and friendly. He not only got the A/C compressor to work but checked the Freon pressure and went in the basement to inspect the remainder of the equipment. He explained what might need replacing in the near future. Now I am not worried about my mother getting heat. I highly recommend this company for any heating and cooling repairs."

"The Tech went above and beyond to do my inspection and service. I did nor buy the yearly maintenance plan and I did not buy the $190. furnace filter ($20) at Home Depot. I had and still have a problem with the system. It makes a growling noise every 2 minutes or so. Thanks so much, anyways."

"Excellent customer service and fast! I highly recommend them, if you need a new system or maintenance this is the company to call!!!!"

"Great experience! I hired Trinity to come out and Tune up and clean my Grandmotherâ s furnace. They were a pleasure to work withâ ¦ very courteous and professional! Extremely clean and friendly! I ended up hiring them to install my Central heating and AC at my home! I couldnâ t be happier!"

"furnace was installed and works well. I repaired gap in drywall above furnace after installation. for $3800 I think they should have offered to repair the drywall or compensation for my work. George reached out to me about my concerns and offered to resolve the issues. I'm very pleased with the job and his customer service."

"Great service, took pictures of problem because I could not see it for myself and after repair showed work done. Also gave very good advise about another repair needed caused by first problem. Great, fast service. Both repair person and office personnel were wonderful."