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

Ilya was professional, punctual, and clearly knew exactly what he was doing. He explained the issue and the recommended solution, answered all my questions, and completed the work efficiently without any upselling or surprises. The quality of the repair/installation was excellent, and everything is running perfectly now. I fully recommend Ilya and this HVAC company to anyone looking for reliable, honest, and skilled service. Will definitely use them again. read more

My AC unit compressor had a problem starting up and would overheat. I submitted a request online and they came back quickly to schedule a visit. Andrew was the tech that came. He was on time, very helpful, and was able to diagnose and fix the problem quickly. Would definitely use them again! read more

Excellent service! The technician Ilya was professional, knowledgeable, and thorough. He took the time to properly diagnose everything, clearly explained what he was doing. Really appreciated his efficiency, attention to detail, and friendly attitude. The whole experience was smooth and stress-free. Very happy with the service and would absolutely recommend them to anyone looking for reliable HVAC work! read more

OZONE Service - HVAC repair - 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 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

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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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

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

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

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

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

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

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 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

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

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

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

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

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

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

Ozone service did a great job replacing the whole HVAC system of my 1959 house. They were very communicative, professional and efficient during the whole project. Their job passed the HERS test and city inspection with no issues. They even came back to haul away the plastics wraps used by the asbestos abatement company for setting up the containment at no extra costs. 5/5 stars for their work! read more

Was about to schedule with them quite easily. Got here and finished the cleaning for my mini split quite easily. Everything looks good and it's smelling much fresher now. It was a bit expensive but it was less than some of the competitors I reached out to read more

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

Excellent experience with Ozone Service! They were able to come out on short notice when my AC stopped working. The technician quickly diagnosed and fixed a failed capacitor and another electrical component, then topped up the refrigerant and made sure everything was running perfectly before leaving. He was professional, knowledgeable, and took the time to explain everything clearly. Fast, reliable service--I highly recommend Ozone Service! read more

Our A/C stopped working right before the holiday weekend, of course. Ugh. I reached out to Ozone because of the great reviews and Ilya was able to come out that afternoon (Friday before July 4!) to assess. He was tremendous - very knowledgeable and thorough. He suggested a couple of options but was not focused on selling the most expensive thing. Much appreciated. Thankfully, the equipment was in stock and they were able to come Monday morning. Ilya came back with a coworker and they installed a new system. Throughout the experience, both Ilya and the rest of the office provided quick, helpful answers to questions, and really listened. I'm happy to report that the new system is working great and is much more efficient than the old one. An all around great experience - I highly recommend. 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

A life saver ....very prompt, excellent work. Definitely would recommend Lavon Bailly read more

Very knowledgeable and was able to resolve my issues effectively! I would definitely call them up again!

Ilya was professional and quick to diagnose the problem and fix the issue. Very happy with the prompt service.

They provided timely responses, the technician was on time, very professional and efficient. Would recommend them for HVAC repair.

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

Recently, our AC wasn't working. We contacted Alex and he fixed the issue for FREE. Our AC and furnace was installed by Alex four yeas ago. He is not just incredibly knowledgeable and skilled, but also a genuinely kind, patient person. Once you experience OZONE's service, I am confident that OZONE will be your first choice for any future HVAC needs. They are the best you can get. read more

I am satisfied with the work done from Ozone Service, especially since they specialize in the HVAC system I have that needed repairs (heating). Andrew was nice, professional and efficient with the diagnosis and completing the repairs. They also worked with my home warranty company which was great. I would recommend Ozone Service! read more

10 star if I could. Furnace went out weeks ago and I put out a bid request on Yelp. The first company I hired (Global HVAC) charged me $250 for a fix that failed the very next day. I called and the company said I should replace the motherboard for another $1,000. Instead, I called Ozone and Andrew came out on short notice. He found a rusted connector within minutes and replaced the piece AT NO COST!!! Shocking! He said he couldn't charge me because he didn't repair anything on the furnace and they don't charge for diagnostic. Unheard of. Ozone is the Nordstrom of HVAC. Amazing, reliable, and trustworthy service. I'm hiring them for my AC unit next. Thanks you Andrew! read more

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Ozone is the best HVAC service I have ever encountered. Our 15-year-old furnace suddenly lost power, and we tried everything we could to diagnose it ourselves--using AI tools, replacing the fuse, and attempting multiple fixes--but nothing worked. Once we decided to seek professional help, the Ozone team responded incredibly fast and scheduled a free diagnosis right away. The technician, Andrew, arrived exactly on time and was extremely knowledgeable. Within five minutes, he identified the problem: a hidden switch that had been accidentally turned off. It was honestly a bit embarrassing. We felt we owed him a diagnosis fee or at least a tip, but he refused and explained that their diagnosis is completely free and that he was simply glad the system was working again. I never imagined a business would treat customers this well. We are planning a home addition and AC expansion in the future, and Ozone will absolutely be our first choice. I highly recommend Ozone to anyone with HVAC needs. read more

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Honestly I would give 100 stars if possible. We had OZONE install our HVAC system and to say we were impressed by the work would be an understatement. Konstantin and the folks at OZONE were extremely competent, honest, and hardworking. Their quoted price was extremely competitive and they are very responsive to our questions. Everyone in the OZONE crew is very polite and considerate when coming into our home. Despite telling them they didn't need to put on shoe covers, they insisted all the same. They treated us and our home with respect. We will use OZONE for all of our HVAC needs. I enthusiastically recommend them. They are the best you can get. read more

Very prompt response! Great assessment of issue and quick follow ups to fix it within 2 hours of reaching out! Would definitely re hire their help in future! read more

I recently hired OZONE HVAC to replace our 50-year-old furnace with a new Gree FLEXX heat pump, and I couldn't be happier with the experience. I got quotes from over five HVAC businesses before selecting OZONE. From the beginning, Konstantin, the project consultant, stood out with his patience, honesty, and technical knowledge. He thoroughly walked me through all the options: new furnace + AC coil, new furnace + heat pump, and a pure heat pump system. He explained the pros and cons of each, including performance, pricing, system size, and rebate eligibility. What impressed me most was his transparency -- he shared that OZONE is a new company, but the team came from another well-established business. Their edge? High-quality service at a competitive price. That, plus their diligence during the quoting process, made them my top choice. Although OZONE is a newer business, they handled everything as seasoned pros. I was their first client for a project of this scope under the OZONE name, and they took care of everything needed to get certified with Peninsula Clean Energy (PCE) so I could qualify for the $1,500 rebate and $10,000 interest-free loan. They processed the paperwork quickly and guided me through it clearly. Alex and Roman were the engineers who installed the system, and they were phenomenal. Alex even came out on a weekend before the install to inspect the house. I had questions about zoning by floor, and unlike other companies who gave vague answers, Alex crawled under the house, mapped out the duct layout, and clearly explained why zoning would be complex and costly due to our setup. During installation, Alex and Roman worked almost non-stop for two days. Our house is on a slope, so they had to build a new concrete platform and move a 100kg outdoor unit into place -- no small task. They also did all the electrical rewiring, mounted clean and organized ductwork, and ensured every seal and connection was done to a high standard. They kept us in the loop for any decision that might affect us, like routing the drain line or reusing the old thermostat location instead of just drilling a new hole. I also had a chance to chat with Alex during one of his breaks -- he's not just incredibly skilled, but also a genuinely kind and passionate person. He mentioned he has installed over 1,000 HVAC systems in his career and even proudly showed me photos of large-scale commercial HVAC installations he had worked on. You can really tell he takes pride in his work. In short, I was blown away by the quality, professionalism, and thoughtfulness of the entire team. Konstantin, Alex, and Roman are skilled, friendly, and honest people. I highly recommend OZONE HVAC to anyone considering an HVAC upgrade -- they absolutely earned my trust and future business. read more

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