1. Yang's Mechanical

    1. Yang's Mechanical

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    Yang's Mechanical

    5.0 (9 reviews)
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    Had an amazing experience with this business! They replaced our entire downstairs AC unit, and the entire process was seamless from beginning to end - from walking us through the installation to completing it in just a few hours. The AC is working great now and we finally wont be melting every summer!

    Fixing AC in condo unit

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    AAA Calvert Electrical, Heating & Air Conditioning

    AAA Calvert Electrical, Heating & Air Conditioning

    (196 reviews)

    This past December, my 73 year old floor furnace would not…read moreignite and warm the house. I called AAA Calvert to come out and check the furnace and thermostat. The representative on the phone was very polite and friendly. She set up an appointment for me very quickly. On appointment day, Scott arrived quite promptly. Scott was very polite, friendly and professional. He thoroughly inspected the furnace and thermostat and diagnosed the problem very quickly. Fortunately, I did not need to replace the furnace. Within a few days, Scott returned and replaced the necessary parts and installed a new thermostat. I waited a couple of months to see how well the furnace operated during these winter months. Now, I am pleased to announce that everything works perfectly. Scott, and AAA Calvert, receive superior marks. The cost of the repairs were quite reasonable for the amount of time and labor the project required. This was SUPERIOR service!!! Thank you, Scott!!!

    I gave AAA Calvert five stars last year, but have to revisit after my most recent experience. First…read moreAdam came out and determined that our fan had broken, possibly damaging the motor, and that he also needed to check the coolant level. He ordered the new fan and motor on the phone while I was with him, so I expected we'd soon be cooled down. I don't want to get too far in the weeds, but ultimately it took four visits and nine days for techs to come out and replace the fan and the motor. They did take $500 off the price, and they were very nice about everything, but unfortunately they forgot to check the coolant level, so the AC was only marginally cooler than the outdoor air. Rather than complaining again, I just called my brother-in-law (who is also in the HVAC business). He found that it was light 4 lbs. of coolant, which he replaced, and now the system is running properly again. But it took almost two weeks during the hottest stretch of the year. I think AAA Calvert is a good business, and I hope this is a learning experience for them.

    Mini Split Installation Gominisplit - single zone 12,000 Btu Daikin mini split installation in Costa Mesa

    Mini Split Installation Gominisplit

    (27 reviews)

    Every year I try to do a home project, and this year I finally decided to install some mini splits…read more My home was built in the 1950s and it has no A/C, which has become increasingly difficult to deal with the last few hot summers. I did my homework and reached out to a few contractors, including Gominisplit, to collect some quotes. I met with several other contractors, who did not show up to estimate appointments, were blatantly rude, and tried to upsell me things I did not need. Jose was a gem. He responded quickly to my inquiry and was punctual for my home walkthrough as well as all visits thereafter. He made sound recommendations and provided a competitive and fair estimate. I hired him because he was honest and easy to work with. He speaks English and Spanish, which was helpful because my dad speaks Spanish and he's the one who mainly coordinated with Jose. He worked very quickly with one other person and had our three bedrooms and living room area up and running in a couple of days. I highly recommend him to anyone who needs minisplits for their home. I'm sleeping nice and cool these days and we're ready for the summer!

    Jose did a great job finishing up our mini-split install. Everthing is neat and orderly, unit is…read moreworking great - cooling, heating and fan. He is professional and super easy to work with. May have him comeback and install another unit. We definitely recommend Go Mini-Split's services.

    VigilAir Heating and Cooling

    VigilAir Heating and Cooling

    (158 reviews)

    When partnering with any service business, my top priorities are attention to detail, great…read morecommunication, and mastery of knowledge. VigilAir has it all! From the estimate with Robert and Suzy, to the day of installation of a first time system with the team, there was excellent communication. Day of, they arrived early (7:15am), and within minutes there were holes being drilled, boxes opened, and conduit being rolled out. Efficient and speedy! They were so kind and accommodating when I asked for a vent to be moved a few inches here and there, and they kept my home and gardens clean and in excellent condition. I thought it was genius to watch one team member hold a cardboard box to the ceiling to catch falling debris, while the other cut through the ceiling. They even color-match painted ducts and conduit on the exterior of our house and never even asked us what color the wall was. It's a perfect match!! Amazing attention to detail!! Above and beyond service included adding a light switch and light up in the crawl space and removing our gross old wall heater. We were amazed when they were cleaned up and done by 6:00pm! They made sure we were happy and came back the next week to adjust a damper and share a little more information. And all for an excellent price. We could not be happier. Thank you so much, VigilAir!! We appreciate you!

    We had our system installed in 2020. Vigil team was very proffesional, friendly and knowledgeable…read more They advise what system fits our needs best. I should of left a review long time ago but through the years they are always there for assistance and troubleshooting. Couldn't ask for more. Robert and Susie and all the staff are simply amazing. Thank you!

    Thomson Air Conditioning - Enjoying another beautiful day working on a/c installation!

    Thomson Air Conditioning

    (644 reviews)

    I was having a heater issue. My heater would come on when it wanted to. But of course it wouldn't…read morework during the cold nights. Thanks to yelp, I found Thomson Hvac The tech and I thought it should be a simple fix. He inspected my entire system, diagnosed the problem, and quoted the job. We moved forward with the fix, and it worked fine, and then it didn't. After a few more visits, and some more parts and tinkering, it finally started working properly. Although it was a strange and difficult situation, they stuck to it until the problem was resolved. The techs Danny and Mark went above and beyond to make sure everything was good. Another thing to add, the way the company communicated back and forth with me was great. They answered every call and every text. Most of the time I spoke with Stacey and she was great. If you're looking for an honest and professional company, this is it.

    My mother recently engaged a service provider for routine maintenance on her air conditioning unit,…read morewhich included the installation of a new Honeywell thermostat. Subsequent to this service, she has reported that the air conditioning is not effectively cooling the premises, with only the fan operating. I advised her to adjust the thermostat to a lower setting. Given her advanced age of 90, her discomfort with the warm air became increasingly pronounced. Today, in collaboration with my brother-in-law, we investigated the issue. We observed that while the unit appeared to be functioning, it was not producing cool air, despite the outdoor fan operating correctly. During our investigation, we contacted the service provider, Thomson. A representative stated that only the thermostat had been replaced and that a service technician could be dispatched for a fee of $159, suggesting a potential wiring issue. Upon reviewing the Honeywell thermostat instructions and wiring diagram, we identified that the thermostat had been incorrectly wired to the "W" terminal. After rectifying this wiring error, the air conditioning unit resumed normal operation, producing cool air. I subsequently contacted Thomson for clarification regarding the initial service. Their response repeatedly referenced a previous replacement 14 months prior. While their online reviews are predominantly five-star, our experience suggests a lack of professionalism. This incident raises concerns about the necessity of recommended services and the quality of workmanship, potentially indicating errors or intentional oversights during the initial installation.

    Yang's Mechanical - hvac - Updated September 2026

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