Rated 4.9 out of 5.0 based on 21 Google reviews Google Reviews

HVAC Service San Jose

We are proud to offer quality and affordable options for
all air conditioning units and Heating systems.
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Air Conditioning repair

Therma Tech Inc knows that it is important to balance our customers’ needs with that of the services we offer. We strive to make it as easy as possible for you to choose our company as the right air conditioning repair contractor for your home or business heating and cooling system needs.

We asses every home or business on space available, climate and insulation in order to help our customers choose the system that will work best for their needs. Working in this way with our customers helps in finding the best air conditioning system that is appropriate, cost effective and environmentally friendly.

Central heating and cooling is the norm for most homes and buildings in California. The initial costs of installing a centralized heating and cooling system is far outweighed by the benefits gained long term. At Therma Tech Inc we strive to keep your home or business just the way you want it, at the perfect temperature for your needs.

Heating and cooling typically makes up about 48% of your utility bill. It doesn’t matter what kind of heating and cooling system you have, you will improve your comfort level and potentially save money by upgrading and properly maintaining your HVAC equipment.

Just having an energy efficient furnace on its own will not have as great an impact on your energy bill as having a trustworthy air conditioning repair contractor providing maintenance and upgrades with recommended thermostat settings, insulation and air sealing. This offers energy bill savings of up to 30% while reducing environmental emissions.

If you are feeling cold in your home or business it may very well be that your heating system is not working as well as it should. Now would be the time to find a reputable air conditioning repair contractor to check your system and make sure it is working properly. Trust that Therma Tech Inc will do it’s best to get your home or business at the perfect environment to meet your needs.


Professional Staff

Reliable, trustworthy, knowledgable and committed

BBB Accredited Business

We're committed to being a business our customers can trust!

Award Winning Service

A+ on BBB, Elite Service Award on HomeAdvisor, & more!


Let us help you take the stress out of home maintenance.

  •   Honest, quick, responsive, highly adept and capable... I can't say enough good things about Therma Tech. I am saving their information and sharing it with friends in the area as I know how very challenging it is to find a company I can truly trust.

    Lar Heng saved my hide. I had been without heat for 3 weeks (live alone, old house, and was going to my son's wedding in days - worried about getting sick for that big event with all the cold and moisture). He was utterly competent, quick, and communicated well so that I knew what was happening (very pleasant person in addition). The expertise with which he diagnosed the problem and fixed it (it wasn't straightforward and simple) was impressive. Sheer competence and deserving of all good things!

    I should add that I had left a message for them on a weekend (when they are closed), and I in no way would expect this - but they got back to me and had me set up for an appointment on Mon morning. That's way beyond the call of duty in addition to all that is wonderful above.


    thumb Ingrid T.

      I would definitely recommend this business to anyone who has an issue with their A/C. I had our unit replaced by Therma Tech almost 10 yrs ago. I've had a few issues during that time but Henry (owner) was always ready and willing to take care of the issue in a timely manner and honor the warranty with no questions asked. Henry is a man of integrity and you can rely on him to do you right! I would definitely give him your business...you won't be disappointed!!Thanks again Therma Tech for your speedy repair time and honesty which is rare these days!!!

    thumb Steve H.

      Henry and his team are the best. Came over same day (during a heat wave surge) when no other companies would, and, on top, saved us over $2000 by being an honest businessman. The first technician we called to see our AC unit (from a different company) was dishonest in his assessment and tried to take advantage of the situation. Henry explained the problem and made it clear that we were given erroneous information and were getting price gauged.

    Give your business to Henry. You won't regret it.

    thumb Shawn H.
  •   Every positive comment made here by others using this company is absolutely true and verified by my own experience.  My AC failed at the peak of the September 2022 heat wave...and on Friday! I called another diamond certified company but received no call back...ever!  On the other hand, Vickie, at the Therma Care office answered immediately was very polite, calm, extremely helpful in attempting to trouble shoot my problem via the phone. When it was determined that the issue required an on-site diagnosis, she managed to work in an emergency appointment which would not interfere with my preset commitment.  I received a text message as notification that the technician was in route, insuring arrival time would be at the earliest end of the window promised.  Henry quickly diagnosed the issue and gave a clear description of what was needed and the cost of repair.  I was very impressed with Henry's straight forward manner and obvious professional skill delivered with kindness and respect for the customer.  Henry and the Therma Care staff went out of their way to accommodate my need and I am immensely grateful!  I have no hesitation in employing and recommending this company to others for HVAC service.

    thumb Sheryl S.

      My AC gave up in the middle of the heat wave. Thermal tech was incredibly responsive and had the most reasonable diagnosis rate. The owner Henry gave me the most honest diagnosis. He was knowledgeable about my unit and encouraged me to look into my warranty. It was under warranty. He even waived the diagnosis charge because he could not help me fix it. If I ever had anything to fix I would not hesitate to use them.

    thumb S B.

      Old Heater/Blower Unit was not working and my Dad had tried to troubleshoot it and couldn't narrow it down. Been freezing for two weeks. I called Therma Tech and was able to get a same-day appointment since I was home. Guy on the phone asked if unit was under warranty, had me check the serial number and gave me more info, very helpful. Two techs showed up, worked out well since one was stuck up in my attic crawlspace. Both were polite and friendly and used masks and booties to keep everything clean. They tried getting the capacitor to work, it wouldn't and it ended up being the motor. They had the parts on hand and fixed the unit within an hour and a half. Let there be heat! I would definitely recommend this company. They gave me the options for a new system and repairing the old unit, explaining that fixing the old one would probably need to be replaced and explained everything to my Dad over the phone (It's a 20 yo unit!). Repair came with one year warranty. I highly recommend Therma Tech since they took the time to actually repair the unit and not just try to upsell me on something I can't afford right now. I will definitely contact them when I'm ready for a new install and am hoping to get on their maintenance program they mentioned as well. Thank you!!!

    thumb Megan J.
  •   During a heatwave, my upstairs AC unit stops cooling.  Two other local HVAC companies didn't return my call.  I called ThermaTech and left a voicemail at 2:10pm and received a call back within 15 minutes scheduling a visit for noon the next day.  Henry arrived early and gave me a text update letting me know he was on his way.  He was knowledgeable and took the time to make sure I understood the components and my repair options.  We were lucky that it was a simple capacitor replacement but he still gave 2 options (standard replacement or replacement plus an extra component that could extend the life of the compressor).  There was no pressure to choose either option.  
    I will call Henry again in April to schedule preventative maintenance that we all ignore until there's a problem.

    thumb Rita P.

      I called ThermaTech and received a call back within 15 minutes.  They scheduled a visit for the next day and replaced the capacitor in 15 minutes. Henry took the time to explain what he was doing and made sure I understood the components involved.  He was efficient and did not pressure me to make a decision.  Ten days after his visit (and successful repair of my upstairs AC unit),  my downstairs unit stopped working.  I called ThermaTech on Monday morning and received a call back within 10 minutes.  Henry provides reliable service!  I'll call him again!

    thumb Rita P.

      20+ yr old Furnace broke at beginning of a cold snap.  They came right away to find out what the matter was.  Scheduled a replacement as fast as possible and we were up and running in less than a week.

    thumb Amy S.
  •   Professional, knowledgeable and friendly service with an owner who stands by his company's work. After a recent heatwave, the fan on my HVAC system would not turn off. Henry determined that I had a bad controller board and was back to replace it a couple of days later. After he completed the work, that night I noticed that the fan would not stay on (yes! the exact opposite of the original issue). It would run for about 2~3 minutes, then shutoff. I texted Henry at 8 PM and he immediately texted me back. I was honestly not expecting to get a response until the next day at the earliest. He patiently worked with me for over an hour as we tried to debug the issue, but he eventually concluded that he needed to come back. Henry was back at the house early the next morning and he discovered that the capacitor on the fan motor had failed. It was an problem unrelated to the original issue, so it was not an oversight on his part. So, clearly not a "smooth" service, but these things happen. However, I was most impressed and pleased with the responsiveness that I got from Henry. It's clear to me that he has professional integrity. I would highly recommend Therma Tech to anyone looking for HVAC service.

    thumb Richard N.

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