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    LJ Mechanical Heating & Cooling

    5.0 (21 reviews)
    Closed 8:00 am - 4:30 pm

    Get pricing & availability

    Response time

    10 minutes

    Response rate

    100%

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    7 months ago

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    Larry A.

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    8 months ago

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    Larry A.

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    6 months ago

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    Larry A.

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    9 months ago

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    Larry A.

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    3 years ago

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    6 years ago

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    Larry A.

    Thank you for the review! Im glad to help

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    4 years ago

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    Ask the Community - LJ Mechanical Heating & Cooling

    Review Highlights - LJ Mechanical Heating & Cooling

    Thanks to Larry's phone help, I was able to solve the furnace problem without a service visit.

    Mentioned in 21 reviews

    Read more highlights

    Dynamic Air Systems - Will removing and rebuilding blower assembly for commercial rooftop package unit.

    Dynamic Air Systems

    (62 reviews)

    Dynamic came highly recommended by a neighbor and they were absolutely fantastic. We've had several…read moreissues with our HVAC system not running properly and not cooling our home over the years. This is the fourth HVAC company we have had come out to take a look and they were the only ones to be able to truly figure out the problem. Eli was able to quickly diagnose the issue, Jason was very communicative and friendly and made sure that we got text updates and phone calls for every appointment. We needed a whole new system due to an evaporator coil manufacture defect issue and they gave us several options to choose from in order to accommodate our budget. Chris and Paris came out to install our new system and they worked quickly, were able to get our new air-conditioning unit and evaporator coil installed in less than a day, and they did great work; it has been running amazing ever since. Jason made sure to get us a system that could accommodate the size of our Home as the one that came with the house was too small for the size of our house. I cannot say enough great things about this team, I very highly recommend calling them for your HVAC needs!

    I needed someone to figure out why my HVAC System suddenly stopped working. Dynamic air systems…read moreresponded to me after hours, set up an appointment quickly, and arrived at my house when promised. They could not fix the issue, but were able to tell me that I needed an electrician to repair a breaker. This advice led me to a quick solution and the air-conditioning is back on! Thank you so much for the quick service and for your good advice. It was definitely worth the $165 diagnostic fee.

    Jr’s Heating & Air - 2 ac unit  for save energy and control 2 different locations

    Jr’s Heating & Air

    (19 reviews)

    We had a broken AC because of faulty wiring of PG&E and the whole episode was during one of the…read moreheatwaves. Jr's service was recommended to us on a very short notice and he was able to make it the same day after hour. He was super on time and had great communication letting us now when he was on the way. We have worked with several AC companies, many high review ones you see on the internet in bay area region. The quality of the work Jr delivered and high volume of cool air coming from AC reminded me today to come and write this review. We expected just a consultation but he had the parts on spot and changed the burned unit right in the first 10 minute of showing up. This is not what you expect usually from AC guys, they quote you for some parts that are not even broken and delay is the tactic. He even washed the filter of our AC recommended changing its type, and even when we asked about protecting our AC from rodent he provided the taping on the piping to reduce chance of damage. There were so many things that were addressed in a short 30 minute visit that need three other AC ppl to address it if we called other companies. Above all he was beyond fair, the quality of his work with the value and price he offers is unmatched. Trust this guy, he is a good family man that fixes your AC promptly with no gimmick.

    Our electrician recommended Pablo as he did some work for their house. Pablo came by and answered…read moreall my questions providing sound advice on mini splits and the nuances associated with different models & brands. I got a quote shortly after which was competitive with the others received. Aside from price, what sold me was the confidence and expertise I felt from talking with Pablo. He called out a few safety concerns that other HVAC technicians did not and that ultimately helped me make the right call. Once I accepted the quote, Pablo ordered the equipment and came by the next day with his crew to start the installation process. After an aggregate of three days in a week's span, the job was completed. Later on when I needed Pablo to assist me in permitting and inspections, he helped me without hesitation and made sure everything was wrapped up with the city inspectors. He's a man of integrity and honest work that will get the job done and support you end-to-end. Would recommend Pablo to anyone looking for HVAC or mini split needs. He has your back and you want him on your team. 5/5

    Air Sharks - Air Sharks team

    Air Sharks

    (98 reviews)

    North San Jose

    UPDATE 8/11: After I posted this review, I was contacted…read morenext day by a manager and then also the owner. The owner actually left a voicemail and I eventually called back. The owner apologized, wasn't defensive, didn't try to get to me explain my self and was just apologetic to what I experienced. They offered partial refund and service to show that they want to fix the wrong and prove that they are a great service company. ------ Original review: I had a very negative experience with air shark technician. My issue was needing the capacitor replaced. The fix was quick and I was clearly over charged. When I asked about this, the technician just said it's just business. He exaggerated the price of the part needed which is a capacitor saying it's like $200-$300. It's at most $50. It took him like 10 minutes to replace the part and said you either accept the charge and pay or I just take it out. It felt very predatory, like I already fixed it you might as well pay. He proceeds to measure temps and other various things just to pass time while he waits for me to decide if I want to pay or have him unfix it. I can accept being over charged but something about how this situation transpired left a bad taste for me. For example, why wouldn't you say you need to replace this and it cost this much for the fix instead of fixing it first then say pay or I take it off.

    Service requested: HVAC replacement. However, after the initial inspection the engineers told us we…read moreneeded to changed the ducts and insulation coming into our house to improve efficiency. It was an expensive upgrade but was the need of the time considering even a top notch system would only work at 40% efficiency. Engineer was thorough in examination. She took lot of photos. Explained the process. Air sharks didn't push for purchasing any particular equipment. We chose Daikin. Service: the work crew is very disciplined. Arrive on time. No loud noises. Informed us daily at the end of the day. Kept our house and side yard clean and tidy. Follow up: the inspection went well. We received the permit as per schedule. First year warranty is included. Whenever, we have called they promptly respond and understand our issue at hand. Over all we are beyond satisfied with contracting with them.

    LJ Mechanical Heating & Cooling - hvac - Updated August 2026

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