I had a great experience with OZONE Service! I was referred to them by a friend, and I'm really glad I gave them a call. My AC stopped working even though there was no tripped breaker and the app showed that the system was calling for cooling. OZONE was able to come out and diagnose the issue quickly. The technician, llya, was professional, knowledgeable, and did a great job explaining what he was checking and what needed to be done. read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

Ilya did a great job diagnosing my house's HVAC system thoroughly and provided me suggestions to improve it. I really appreciate his help today. read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

We had an issue with our heater not blowing any air. We initially hired another contractor who charged us $400 to replace a panel, but it didn't fix the problem. They then gave us a $3,600 quote to replace the motor and other parts. We decided to get second opinions from several HVAC companies. While most charged $50-$75 just for an estimate, OZONE offered free estimates. Their technician thoroughly tested the motor, confirmed it was completely fine, and identified that the actual issue was the control board. He replaced the control board for $750, which fixed the problem immediately. Although we lost $400 with the first vendor, OZONE saved us nearly $3,000. They also provided a 1-year warranty on their work. I really appreciate their honesty and excellent service, and I will definitely use them again. Highly recommend! read more

The HVAC was not working and I was recovering from surgery. Ozone Service sent someone immediately. The owner was courteous and warm to the point I asked him if he was AI! He sent someone the same day to fix the HVAC. Andrew was knowledgeable, very professional and we are happy customers. read more

I had a great experience with Ozone Service. The scheduling contact was very friendly and offered different appointment times. He was able to schedule me for an appointment very quickly, which was a huge relief since my air conditioner had stopped working during a hot spell. They offer a free diagnostic service, whereas others do charge a fee that can be applied towards same day service; I felt offering a free diagnostic shows they are confident in their service offer. The technician, Ilya, informed me of arrival plans, arrived on time, was professional, and took the time to thoroughly explain what was causing the issue and how he diagnosed it. I appreciated that he walked me through the findings in a way that was easy to understand, without making me feel pressured. I received a written quote online with details of repairs to approve in an app online, We also discussed the age of the unit and typical issues that could arise in the future for maintenance and replacement planning. Repair was completely quickly and there is a 1 year parts and labor warranty included. Based on my experience, I would definitely recommend Ozone Service to anyone looking for honest and professional HVAC service in the Bay Area. read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

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I would highly recommend Ozone service for anyone who needs fast and honest HVAC service. Their technician came out to my location quickly and diagnosed the problem in a timely manner. The technician clearly explained the options for a solution and then delivered on the fastest and best fix for our issue. I would highly recommend Ozone services for anyone that needs fast and reliable HVAC service read more

OZONE Service - Ozone Technician - Heating & Air Conditioning/HVAC Near Me - San Jose, California

Quick turnaround and professional service, which for an HVAC failure in heatwave season is all you really want. They were one of the few that offered a free diagnostic and no obligation so ended up going with their repairs. Process was all pretty seamless from start to finish and very courteous in keeping home clean and clearly explaining the diagnosis/resolution options. Definitely would use them again! read more

I recently had Ozone Services install a heat and cooling electric heat pump to replace my 30+ year old gas furnace and a/c compressor. They are very knowledgeable and licensed and certified by several manufacturers (eg Daikin, Mitsubishi, etc.). They provided the most competitive quote and advice on which models to choose. Provide 10 year equipment and labor warranty. All permits handled by Ozone with the City and inspection passed with flying colors. The work was very neat and professional looking and they hauled away the old equipment and cleaned up after completion. They even assisted with applying for the various rebates available. They have trained and licensed electrician who also installed an EV charger in the garage during the same 2-day job. I highly recommend Ozone Services. Contact them for a free quotation by Konstantin and let them know I recommended them. http://www.serviceozone.com/, (408) 689-6921 read more

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Great experience during a heatwave! Ilya arrived right on time, quickly diagnosed the AC issue, and explained that my parts were covered under warranty. He also gave me clear advice on potential future issues with my overall system. Very honest, knowledgeable, and punctual. Highly recommended! read more

My AC unit had stopped working. I sent a message to OZONE Service and got an appointment the next day. The technician showed up on time. He diagnosed the problem quickly, explained the issue and recommended the fix within 15 mins. He was super friendly and helped me understand the problem by answering my questions patiently in simple English. He also recommended things to do to maintain the unit and when to call them. Overall great experience and would highly recommend. read more

Awesome AC repair experience with Ozone Service! We had a problematic AC that wouldn't turn on consistently. It was probably due to a wiring issue with the soft starter installed by Tesla, and the problem wasn't reproducible every time. Andrew arrived on time, performed the diagnosis promptly, quickly identified the issue by checking the wires, and provided a solution. The quote was reasonable and the repair was finished within 40 minutes. I wish I had found this team earlier and gotten it fixed sooner! Will reach out to Ozone in the future for other HVAC services! read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

My AC stopped blowing cold air in the middle of this heatwave and after having one company flake, I called OZONE to make an appointment. Ilya showed up on time in the time window and completed a full diagnostic of the AC unit, verifying the hvac controls, and even checking the crawl space in the attic. He was able to provide a fix and install a new starter unit in less than half an hour to provide much needed relief. Thanks OZONE! read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

Five-Star Review for Ozone Service -- Excellent Service from Ilya! After a fire in the adjacent business, our business suffered significant smoke damage and we were closed for nearly five months. When we finally reopened, we had ongoing problems with our HVAC system. We originally hired another HVAC company to clean the system and get it operating again. They eventually got it working, but shortly afterward it stopped. They came back and replaced the transformer, which got it working again--but unfortunately, it stopped working once more. At that point, we were told that the low-voltage wiring would have to be completely rewired at a cost of nearly $2,000, and we would have to wait almost a week before they could do the work. With it being summer and our business having already endured so much, we simply couldn't afford another five days without air conditioning. That's when we called Ozone Service. The very next morning, Ilya, their service technician, came to our business. He spent approximately three hours carefully troubleshooting the system, and he did so at no charge. Rather than immediately recommending an expensive repair, he took the time to actually find the problem. Ilya determined that we needed a new thermostat and that there were also some loose connections causing the problem. We hired him on the spot to make the repairs, and the total cost was only $650--a fraction of what we had been quoted by the other company. It's now been more than a week, and our HVAC system is still working perfectly. The new thermostat is also much easier to use than our old one. We are giving Ozone Service and Ilya five stars for several reasons: * They were extremely responsive. * They came out the very next morning. * Ilya spent three hours troubleshooting the system for free before recommending any work. * He found the actual problem instead of simply recommending a very expensive repair. * The repair cost was dramatically less than the $2,000 we had been quoted elsewhere. * Most importantly, our AC is working perfectly! After everything we've been through with the fire, the smoke damage, the business closure, and the HVAC problems, finding someone who was honest, thorough, and genuinely willing to help meant a lot to us. We certainly hope we don't need HVAC service again anytime soon--but if we do, Ozone Service will be the first company we call. Thank you, Ozone Service and Ilya, for your excellent service and for treating us fairly when we really needed it! read more

I had a great experience with OZone Service. After I contacted them about my AC not working, they scheduled a visit for the very next day. The technician arrived on time, quickly diagnosed the root cause of the problem, and had everything fixed in under 30 minutes. The entire process was smooth, professional, and efficient. I really appreciated how knowledgeable the technician was and how clearly they explained the issue. It's refreshing to work with a company that responds quickly and gets the job done right. Highly recommend OZone Service! read more

Called OZONE late Friday night and had Andrew out by 8am Saturday. He diagnosed the failed starting component quickly, had the part on the truck, and had the system running and verified cold before he left. On time, no upselling on a 25-year-old unit, one-year warranty on the repair. Exactly what you want from a service call. Highly recommend. read more

They are very fast and professional. They came estimate new HVAC system for free with comprehensive measurements and estimates. They cover the whole services including permit application, installation and clean up. They responded my emails in a timely fashion. They provide long term maintenance. Everything is perfect. read more

OZONE Service - The new AC they installed professionally and quickly. They moved the whole system to our side yard to save space. - Heating & Air Conditioning/HVAC Near Me - San Jose, California

One of the quickest responses i got for my request for my ac repairs. the technician came in the next day ; debugged the issue and fixed it - all at a nominal price. Will be calling them next time i have JVAC issues read more

Just had service on our broken AC today. Ilya came right on time, at the top of the time slot; very professional, attentive and very pleasant to deal with. Figured out the problem quickly, plus additional issues with the initial installation, and set about working quickly. Will bookmark OZONE for future work, should there be a need for it. read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

Thank you Ozone. Ilya was very fast, efficient and knowledgeable about HVAC units. Thanks for replacing my broken components on my 25+ yr old system! Alex and Andrew were also very professional! read more

We have a leaking through emergency pipe visually today. We called Ozone for quote but surprisingly Illya offered a reasonable price and fixed our problem within 1.5 hr. He has explain to me how to do simple care to stay away from future problem. I definitely recommend Ozone Service for your services need. read more

Fast response Professional service Reasonable charge Still need more time to assess if the replaced components are good quality in one year, I hope it is way more than one year! read more

My AC was not blowing cold air at max speed and I had gone through two diagnostic jobs previously with no positive results. I contacted OZONE for a consultation and Ilya came to site. He checked the system carefully and communicated with my throughout this process. That made me feel very informed. In the end he fixed my issue and my AC is blowing cold air at max speed. Viola! He also checked my refrigerant levels as asked. What I liked about the process: 1. He was thorough. 2. He was communicative. 3. No fearmongering, just diagnosing. So far I liked OZONE with Ilya's expertise. I would be highly inclined to go to them for future HVAC needs. read more

I highly recommend OZONE for your HVAC repair. Another contractor quoted me thousands of dollars to fix a problem that didn't exist. Andrew showed up on time and diagnosed the issue, which was that a fail safe switch went on when the capacitor failed. You have a customer for life! If all contractors were this honest... read more

Wanted to change gas furnace to electric heat pump that can qualify for upgrade rebate. Found ozone from Yelp and saw it has good reviews, so decided to try it out. Turns out their services are really good. Konstantin was helpful and responsive throughout the process. He's able to provide quote for different brands and explain the pros and cons for each of them. The price is pretty competitive too compared to other service providers. A bonus is that they can also do duct replacement even it has asbestos. It saves the trouble of finding another guy to do the work separately. The heat pump installation was successful and looked good. They are able to help out with the permit and inspection too. So the whole process was smooth and nothing much needs to be worried about. The thermostat wasn't working the next day and I requested them to take a look. They were able to send someone to fix it the next morning too. read more

OZONE Service - Heat pump installed - Heating & Air Conditioning/HVAC Near Me - San Jose, California

They never let me down. This is my second time working with them. Konstantin reply me very fast and coming in the second day. Explaining the choices and have a detail document of everything, and difference between each choice. I start to fall in love with my house after their work. Konstantin is an honest, professional person that I have ever met. I have no doubt they have 100% satisfaction rate on the website, since they are good at listening and understanding people. I replaced my HVAC system here, GREE is my favorite brand in China. Happily they provide this brand to me this time. read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

amazing work with great job!! reasonable labor charge! Thanks you for helps to fix right away! read more

OZONE Service - Heating & Air Conditioning/HVAC Near Me - San Jose, California

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We just got our old AC repaired by Ilya. It was a great experience. He came on time and inspected the system and gave us an unbiased view on the repairs. Even though our unit was 17 year old he did not push us to change it but gave us options. Even educated me on the heat pump idea which will be beneficial for long term. We did repairs for now but I am sure we will call him when we decide to replace read more

OZONE service is fast to respond to my request and offers service in two days. The technician is productive and knowledgeable, and offers me options to consider, while educating me how to monitor in the future. read more

Absolutely incredible. Andrew was a man of few words. He looked at everything, said he could fix it, gave us a reasonable rate, and fixed it in 30 minutes. A previous company didn't work on our older unit, and quoted us 18k-32k to get it replaced. They were nice, but we couldn't just drop that. 10/10, would recommend. read more

This is a small company with a group of hard working and very experienced professionals. I've hired them recently to replace a gas based furnace & AC system with heat pump and am very pleased with their work. The installers are knowledgable and friendly. They work hard and very thorough. They clean up the work area until it's spotless each day before they leave. Their sales rep Konstantin is one of the best sales people I've ever met. He's very knowledgable, honest and straight forward. He explains everything very clearly in a concise and professional manner. It's very easy to talk to him. He's made himself available to us throughout the process and responded to my text within minutes even very late on a Friday night. I was blown away. The owner Alex used to be the best installer at a well established HVAC company before he started Ozone Service. He supervises every project. It's very easy to talk to him and he answers every dumb question we have with a smile on his face. I have to say all of them are easy going and likable people. This is a small firm in a growth phase. Their price quote is very competitive and they deliver high quality work. I highly recommend them to anyone who are looking for contractors for HVAC related work. read more

I cannot say enough about Ozone Service, Konstantin and the entire team. From reviewing our options, explaining the technology, filing permits and helping us with rebates, they could not have been more patient and thorough. The installation was meticulous and our inspections were a breeze. While I had reached out to three different companies to quote my heat pump, Konstantin has the most knowledgeable and did a wonderful job explaining my options. Seriously, I love my heat pump! My home is SO comfortable ALL the time! read more

Called Ozone about another outage of our heater. The technician came the next day, tweaked some settings, and then told us there would be zero charge for the change. He came out for free, and said he didn't fix anything. I think Ozone needs to give the entire world some lessons on customer appreciation and general kindness. They are amazing, and I highly recommend their services. read more

Very professional and smooth service. Ozone was able to accommodate an urgent appointment within 1-2 days. Andrew came in for a free diagnosis and helped us fix the contactor, capacitor, fuse within 1 hour. He also did thoroughly testing to ensure that everything works! Highly recommended service from Andrew and Ozone. They also offer 1 year warranty. read more

I had a blockage issue with my HVAC system, and this company did an outstanding job. They responded quickly, identified the problem right away, and fixed it efficiently. The technician was professional, knowledgeable, and took the time to explain what caused the blockage and how to prevent it in the future. The service was prompt, reasonably priced, and the system has been working perfectly ever since. I highly recommend this HVAC company to anyone looking for honest, reliable, and high-quality service. read more

Ilya was very helpful when our AC stopped working. He came same day and found the immediate problem and fixed it. He also pointed out a larger issue with how our AC was installed that we plan to fix down the road. read more

Ozone service helped me with when my outdoor ac unit was running but no air was circulated in the house. They helped replace starter kit and blowout motor. The technician was timely and efficient. They were professional with explaining the root cause and assess system health. Will recommend them for any AC-related issues. read more

AC didn't work after my vacation, it was so hot for a few days. We were like in the death valley. It's was so fast to diagnose the issues and everything works fine. Thanks!!! read more

OZONE Service - All done in short time - Heating & Air Conditioning/HVAC Near Me - San Jose, California

We came back from vacation and our AC had stopped working right before a heat wave. Ozone was a lifesaver and got back to me quickly, scheduled a technician, and resolved the issue for us all in less than half a day. Andrew was early and quickly diagnosed and fixed our unit. Thanks for the great communication and taking care of the fix so quickly! read more

I installed Google Nest Thermostat Gen 4 last weekend. Due to my personal mistake that I forgot to turn off the power when installing the device, I got "rh no power" error when setting up the new device. I tried to fix it but I don't have professional knowledge or equipment. Found the Ozone Service on Yelp and the owner offered FREE inspection. I cannot believe my eyes since all the other merchant I've quote all ask for an inspection fee of $69 or more. The technician Alexander dropped by my house by the appointment time, and did a quick check of the heater within 10min. To my greater surprise, they fixed my broken fuse for FREE. I couldn't believe my ears and it is too good to be true. I cannot recommend Ozone Service enough for their excellent service, professionalism, speed, reasonable price, and care for the customers. Will definitely call for their service again if I have any issues with my HVAC system in the future. read more

OZONE Service - My new Google Nest thermostat is working after fuse replacement - Heating & Air Conditioning/HVAC Near Me - San Jose, California

Ilya is prompt, professional, knowledgeable and respectful. He performed diagnosis to isolate problems and proposed remedial suggestions. He leaves a trustworthy impression. I highly recommend the company and their service. read more