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McMaster Mechanical

★★★★★ 5.0/5 (23 reviews)
20903 Ambushers St, Diamond Bar, CA 91765 (714) 497-0225 Website
McMaster Mechanical McMaster Mechanical McMaster Mechanical McMaster Mechanical McMaster Mechanical

Reviews (23)

Lizbeth Ulloa-Davila
Lizbeth Ulloa-Davila
★★★★★ Jan 20, 1970

In the middle of a cold spell, our heater stopped working. Bryan and David came out and got our heater working again the same day I called. They were professional and neat. I would call them again, without hesitation, if I had any other issues with my HVAC. The invoice was very detailed as well. Overall, they provided a great experience and a great value.

Annie Verdries
Annie Verdries
★★★★★ Jan 20, 1970

Bryan and his crew are fantastic! The repaired my old rickety furnace so I would have heat. Very responsive and with very reasonable prices. They are the best!!!!!

Jack Weber
Jack Weber
★★★★★ Jan 20, 1970

Arrived within an hour of the time I texted brian. Very professional and got right to the problem, had a quick solution which was sort of what I expected, no fuss or muss. Very reasonable charge for the service, and then looked over my outside air conditioners, and will prepare a price for replacing both of these worn out units. Highly recommend Brian.

Priyo Majumdar
Priyo Majumdar
★★★★★ Jan 20, 1970

Great experience. Problem - the heater would not blow warm air. Called on Tuesday afternoon, received a call back from Bryan Heer in an hour, and he showed up in another couple of hours. Very thorough with the job. Good diagnosis and attention to detail. And looks like he really puts his heart into making the HVAC system work the best. Price was reasonable. A great find. Thanks, Bryan.

Norma Gomez
Norma Gomez
★★★★★ Jan 20, 1970

Excelent service 100% recommend, good price, and repairs done fast and accurate

fo' Shizzle
fo' Shizzle
★★★★★ Jan 20, 1970

Got an AC issue acting up yet again on a humid SoCal summer weekend. To my surprise, Bryan and his company showed up in PM on the same Monday called. Bryan immediately went to work and checked everything possible, performed test and stayed for 20+ minutes to make sure it is up to his standards. Highly recommend this guy and his professionalism, he's earned my business. All kudos!

Bo W
Bo W
★★★★★ Jan 20, 1970

These folks know their jobs, very thorough and profesional. I suggest you give them a call if you have such needs.

Herm Wong
Herm Wong
★★★★★ Jan 20, 1970

We've used Brian's services a couple of times. The first time he was able to bring 30ish year old central AC back to life. The second time, we had our entire HVAC system replaced. Brian was provided us several options and was very upfront & honest with his recommendations. A few days after we had our HVAC replaced we had an issue with our AC during a heat wave, Brian even came out on a Saturday evening to come troubleshoot & fix the issue. If you're looking for top notch service and high quality work, then you should contact McMaster Mechanical for any of your HVAC needs.

Chandler Cruz
Chandler Cruz
★★★★★ Jan 20, 1970

Bryan is the man! My knight in sweaty armor. The bread to my butter. The salt to my pepper. He and David are like Thor and Mjolnir. With a little wiggle of their fingers, magic starts to happen. I called Bryan with my pleas for help to make the heat go away. He asks, "What's the problem?" To which I reply, "Kind sir, my just-out-of-warranty unit has stopped working." He asks for some details, I divulge what I know, and he comes back with, "I think I know what the issue is" and proceeds to lower his sunglasses. Out of nowhere The Who theme song starts playing in the background, and I'm like... this guy is good. Well, at least that's what I pictured in my head during the initial phone call. Fast forward a few days and he's inspecting my unit. Straight away the cause of the leak is revealed, and Bryan's hunch was right. He goes around inspecting the rest of the HVAC system and proceeds to complement how big my unit is. But with a twinkle in his eyes he winks and says, "Brosef, bigger isn't always better." At this point, I have to make a life altering decision: do I patch things up with the way things are or do I go through with the procedure of shrinking my unit? The cost differential was minimal, so I made the tough decision to go with the HVACtomy for the better efficiency. Bryan makes a few calls to order the parts and leaves to go do another job. To my surprise, he was able to return to finish the job later that afternoon. McMaster Mechanical to the rescue. A few hours and some chicken tenders later, I have a band spankin' new AC unit with the matching evaporator coil. I even got a proper gable attic fan to get rid of the old one that would vibrate the whole house. Once the system was confirmed to be leak free, it was recharged and the sweet bliss of cool breeze oozed through the vents. If it weren't for the tag team of Bryan and David, I wouldn't be sitting here cool as a cucumber writing this legendary review. Thanks for the hard work fellas, now I get to do

Jerry Zhao
Jerry Zhao
★★★★★ Jan 20, 1970

Fantastic work. Bryan was very responsive while working around a tight schedule. He was able to fix our broken capacitor quickly. Highly recommend for anyone in the area.

Carol Campbell
Carol Campbell
★★★★★ Jan 20, 1970

McMaster Mechanical is the only company I would use for all of my HVAC needs. Bryan installed two mini split systems for my room rentals and also repaired my main AC. I highly recommend them.

Angel “Cuban” Gonzalez Jr.
Angel “Cuban” Gonzalez Jr.
★★★★★ Jan 20, 1970

Very professional and expediatious service. I called Bryan today and within 20 minutes he was knocking at my door. After a few minutes, he knew what the problem with my furnace was and repaired it. Home is warm once again. Thanks Bryan💯🙏

Lena Khan
Lena Khan
★★★★★ Jan 19, 1970

Such a nice guy and the only one who really put valuable time into our issue that was driving me insane. He knew what he was doing, he kept at it till he figured it out, and oh yeah did I mention he's such a nice guy!

olga griswold
olga griswold
★★★★★ Jan 19, 1970

Excellent work. Bryan provided different options and once we chose what worked best for us, he and David installed our system quickly, efficiently, and neatly. It wasn't cheap, but not any more expensive than the estimates we got from other contractors. And there were no "surprise" additional costs cropping up as the work progressed. Highly recommend McMaster Mechanical for your AC and heating needs.

K K
K K
★★★★★ Jan 19, 1970

I would recommend Bryan for fixing your A/C and providing quality services. I could not be happier If you want someone that is honest and up front I would call on Bryan to fix your air conditioner. Our any other services!!

Rick Leos
Rick Leos
★★★★★ Jan 19, 1970

Bryan is top notch! We contacted them as a referral from a family friend who he installed a new AC system in there home. He came out to give an estimate for upgrading out heating and installing AC. He was all over our house from going under to crawling in the attic space (very tiny) . I never expected the estimate to be so thorough and comprehensive. Although we await the numbers so far he’s excellent and I recommend considering him and his company! Thanks again Bryan !!

Debbie Laule
Debbie Laule
★★★★★ Jan 19, 1970

Excellent work and very hard worker. He was on time and cleaned up after himself. Our job was very complicated and he figurred out the best options for us. Also, he made changes along the way to adapt to our residence.

Mark Wissa
Mark Wissa
★★★★★ Jan 19, 1970

Bryan was great to work with, he came right on time on a very short notice call. He was explaining every step and everything he was looking at and was very professional. He repaired the heater in a timely manner and provided a great service at a very reasonable price given that he came during the holidays. Great service! Always go to Bryan for any heating/AC maintenance issues.

Anil Mehta
Anil Mehta
★★★★★ Jan 19, 1970

Very happy with his work Bryan is a professional

Jaclyn Perham
Jaclyn Perham
★★★★★ Jan 19, 1970

Bryan was great to work with and really knows his trade. He came recommended by a friend and we will be sure to recommend him to others. Not only was his work great but he was motivated to get it done no matter what it took…and our 1957 home definitely gave him a few tests! He was on time, paid attention to detail, honest, client focused, and worked harder than most. We will defiantly keep in touch with him for all our heating and AC Needs. Highly recommend McMaster Mechanical!

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