When our furnace/AC suddenly would not operate, we called Otter because they had given such good service in the past. However, the receptionist told us that all of their appointments were booked for the rest of the week. We explained that would be a problem because we are confined to the house 24 hours a day. Then Ali said he would send someone that day after the regular appointments. The tech person came around 7 PM and stayed to 9 PM until he fixed the problem. Everything has been working fine since then. We really appreciate their extending themselves for us along with the reliable, reasonably priced service. read more

Ali was able to fixed my AC issues last year with a capacitor. Unfortunately, this Spring, my grandpa unit has finally decided to go to AC heaven. Fortunately, I was able to call Otter HVAC. They were able to get me a quote right away, and work started shortly. Quote was very reasonable and explain clearly what was going to be done. The office checked in with us multiple times. Their technicians were great, on time, clean, and true professionals. Happy with my new HVAC units and happy to be a reference for these guys any day. read more

Otter HVAC - New units - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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Great guys, great work. Friendly, professional, thorough with high attention to detail. I had a much needed overhaul of my duct system -- all my ducts were moved from the crawl space and discarded (due to rodent contamination) and new ones were reinstalled in the attic. They did everything to code and caught a few things that needed to be brought up to code, which I was grateful for. You can tell they take a lot of pride in their work. Competitive pricing. Highly recommend. read more

We cannot say enough good things about Otter HVAC! They came through for us during an emergency situation when my elderly in-laws' Carrier Infinity HVAC system suddenly stopped heating their home. We were worried given their age, health (cancer chemo) and the cold weather, but Otter HVAC responded immediately and treated the situation with real urgency and care. From the moment we called, their communication was clear, prompt, and reassuring. Ali arrived quickly the next morning, diagnosed the issue with the Carrier Infinity system right away (clogged filter caused the Carrier system to auto shutdown), and had the heat restored before things became unsafe. They were incredibly professional, knowledgeable, and patient in explaining what went wrong and what we should keep an eye on going forward. Ali even showed me where to find the Carrier error codes on the inside the furnace panel door. What really stood out was the compassion they showed for my in-laws--kind, respectful, and genuinely focused on making sure they were comfortable and safe before leaving. We are incredibly grateful for Otter's fast response and outstanding service. If you need an HVAC company you can trust--especially in an emergency--Otter HVAC is the one to call! Highly recommended. Cannot wait to have Otter help us with our desire to install a heat pump in our home in 2026. Thanks again Ali! read more

I came across Otter HVAC while shopping for a heat pump system and Ali came out promptly as scheduled to provide me with options for how I can upgrade my current system. He was friendly, knowledgeable, and courteous. The air handler doesn't fit my closet but I'm calling Otter for anything related to my existing system in the future! read more

Our HVAC filter was inaccessible, not allowing us to easily change the filter. Turns out that some of the electrical wiring was also in the way. Ali did a superb and thorough job of fixing everything that needed to be done. read more

Otter HVAC - New sliding door installed for easy filter access - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

I used Otter HVAC for a much larger job than my first one, this time I had an air conditioning unit installed in my attic. They were much more affordable than other quotes, did the job quickly and efficiently and took care of the small things like registering the unit for the warranty coverage. I'd highly recommend them and will be using them for future electric or hvac needs. read more

Ollie just left my home. My nest was losing power and not charging. He connected a new wire and refused to charge me - said it was the easiest job he would do this week. I'm a little embarrassed for calling a pro to do something so easy, but he got into the attic and looked at the wiring on both my furnace and the thermostat unit - and I just wasn't comfortable messing with the electrical myself. Anyway, I couldn't be happier! He showed up on time. Wore shoe protectors. Was professional and communicative. Was in and out in 30 minutes. Thank you so much!! read more

Reached out to these guys in the morning and by 2pm same day the boss Ali came out to diagnose and fix the issue same day. Honest assessment and really fair pricing. We used a lot of HVAC companies but these guys are the best ! Highly recommended A+++ read more

Otter HVAC - Nest Smart Thermostat - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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Ali and his crew were very friendly and professional. I had my 38 year old heating and air system totally removed and a new Mitsubishi Electric Heat Pump system installed, including new under the house ductwork. Very hard workers and I was very pleased with the finished project. I would reccomend them to anyone wanting a new HAVC system. read more

Otter HVAC - inside unit - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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These guys were awesome!! They were so fast to respond and get the job started. Our house is so old there were many issues they had to deal with, but they didna great job. Between old gas lines, odd flooring and refinished ventilation there were ao many issues, but Otter HVAC took care of everything. They were competitive priced, professional and friendly. I couldn't be happier. read more

Otter HVAC - Floor mounted heater - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Ali and his team were the most responsive company when I reached out for furnace repairs. They were able to come out on the same day, were kind and courteous in my home, worked efficiently and resourcefully to diagnose and fix the problem. Great experience with wonderful guys! read more

Otter HVAC - Job done - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Careful advice, amazing service, great explanations of choice and options. Highly recommend.

Otter HVAC clearly prioritizes customer service. I needed cleaning of my gas wall heater and they quickly gave me a fair quote. On inspection they found it needed replacement, all the while being very courteous with clear explanations. I received lower quotes, but after researching the company and my positive experience, I chose Otter. Again, they were courteous and respectful during the replacement, leaving the area well cleaned up. They did a great job on the replacement and our interaction. Highly recommended. read more

Otter HVAC - Gas top-vented wall heater. - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Ali, who owns the company, came out after I called on Friday, the earliest appointment that worked for me was today, but they could have come earlier. They responded super quickly and were very informative. They told me the price to come out, and Ali arrived. They responded very quickly when I called their offices. He unclogged my AC and showed me what was going on, explained what the issue was, and explained the services they offer. Very Professional and polite. Steve, with whom I talked on the phone, was very friendly and nice and quick to call me back. Overall Great company and very friendly owner and staff. Will use them again when I need to do more work on HVAC, but they also do Electric work! Highly recommended read more

Otter HVAC - Ali and I after a good well done! - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Highly recommend! We replaced our old gas furnace with a new heat pump. The entire process was very easy, seamless. Pricing was very competitive and they stand behind the service they provide. Great company if you're looking to upgrade your homes HVAC system! read more

I asked for a bid to install a split a/c in one room. I shopped prices for the unit and found a cost of &1500-$2000. The quote I received for the unit and installation, that entailed 2 days of labor, was $12,000!! read more

Super happy with Otter and the entire team. They replaced our furnace right during the cold snap as ours went out and we were desperate. They made it all so easy and the price was right! I will definitely use them for all of their services in the future if/when needed. read more

Great Service! My wall heater died during the start of the cold season, and I could not figure out why it wouldn't stay lit. After trying and failing to tackle the problem myself, I decided to hire some help. I reached out over the weekend, and Ali was able to schedule me in the following Monday. The service was great, and they got my heater up and running again! read more

Otter HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

I'd a great experience with Otter HVAC. Roman came out to view my projects and he was very professional, and quoted a good price. Nate came to do the project and he was very friendly, worked efficiently and completed the job beyond my expectations. I finally have 2 TVs with no visible electrical wires and they look so much better now. The only thing I needed to do was spackle and paint. read more

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The team at Otter HVAC were a pleasure to work with. When my kitchen vent ducting needed repair, Ali came and provided a quick and reasonable estimate. Mike came later that day and fixed not only the problem I saw, but also a loose connection higher up. Look no further for your HVAC needs! read more

Otter HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

I had a good experience hiring Otter. They were transparent about pump options and pricing. They were able to work around my availability. They even came for a follow up to ensure there is no leak. Overall I believe they are honest and hardworking folks, I would hire them again if need arises. read more

Exceptional service. Ali came out and took a full assessment of my house's ducting system, and gave me a full rundown of my best options. He was very knowledgeable and informative. Otter HVAC had beaten the price of a competitor, and they were way more communicative and professional. This is a highly organized, motivated, and efficient company. They came, took the old unit out, repaired the old concrete foundation, and put the new unit in, all in a short turnaround. My house is located on a sloping hill, yet they problem solved and got a crane to put the unit high on the hill near my house. The new HVAC unit is beautiful and works perfectly well. I would highly recommend Otter HVAC to anyone who is looking to have their HVAC unit replaced in a professional and timely manner. read more

If you're even thinking about HVAC work, stop what you're doing and call Ali and his team at Otter HVAC. We were exploring adding A/C to our existing central heating system--simple enough--until we got hit with quotes suggesting we'd need to replace the furnace too. Then Ali showed up. Instead of upselling, he educated us. He walked us through our entire system, pointed out that a new furnace wasn't necessary, and found smart, cost-effective fixes--like new circuit breakers and upgraded motors--that would get us the performance we needed without the extra expense. He gave us the most reasonable bid, but here's the kicker: our house turned out to be a total wildcard. Let's just say it was built with...creative freedom, not architectural foresight. The job was way more complicated than expected, but Ali didn't blink. He stayed late to make sure our heating was back up and running that same day, and then came every day for a week to help us tune the system until it ran like a dream. Kind, calm under pressure, and clearly operating at a level of competence most HVAC folks can only aspire to--Ali's the real deal. Otter is now our go-to for HVAC, and we've already recommended them to our HOA. Bottom line: if you're in a jam, do yourself a favor and let Otter HVAC help you out. You'll wish you had called them sooner. read more

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I had furnace that was making more noise then it should have and wasn't staying on for more than a few seconds. I contacted Otter to come take a look and was able to schedule an appointment within a day. The technician came out, identified the issue, fixed it without requiring any parts, and then stayed for about 20 minutes to make sure there were no further problems. Communication was easy throughout and I would call them again next time I have a HVAC issue! read more

Professional, precise, and easy to work with. Otter HVAC handled a Heat Pump Water Heater (HPWH) installation, including electrical and plumbing, with clear communication, competitive pricing, and a reasonable timeline. Despite unavoidable challenges, the team was thoughtful and collaborative throughout. Thanks to Ali, Roman, and Mike -- would absolutely recommend. read more

On June 6, 2025, Ali and Tony from Otter HVAC came out to fix my air-conditioning/heating unit -- and I am beyond impressed. After two YEARS of ongoing issues and 15 work orders through my apartment building with no real fix, Ali and Tony had everything up and running in just an hour and a half. They were professional, respectful, and clearly knew what they were doing. After so much frustration and waiting, it was a huge relief to finally have the issue resolved -- and so quickly! I can't thank them enough. If you need HVAC help, don't waste your time elsewhere -- call Otter HVAC and ask for Ali and Tony. They're the real deal. read more

Otter HVAC - Ali & Tony Otter HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Our A/C condenser unit would keep running indefinitely after the Nest thermostat had been turned off. I checked the Yelp reviews and picked Otter HVAC. I left detailed request on Yelp to Otter. Ali answered my Yelp query quickly, in 10-15 minutes, and we set up an appointment for the next day (a Friday before the long weekend). He needed a part, so he had to come back on Tuesday and installed the defective contactor unit. While we were testing it, The cooling fan stopped working. Ali had to come back again with a new fan, the next day. Everything has been working okay since then. The cost was about 2/3 parts and 1/3 labor. I will definitely use them in the future. read more

After 7 years, our AC stopped blowing cold air and Ali was able to come the very next morning to fix it. He was upfront about the diagnostics cost and what needed to be repaired. I appreciated how he explained the manufacturer of the parts that we currently had versus what he was using. He also gave clarity on the lifespan of them so that we're not being up charged down the line. I highly recommend his business! read more

Otter HVAC - AC unit - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

Alibi came out to inspect our 20+ year old furnace, which had been coming on intermittently. He identified a few issues that could not be fixed and said we would need a new furnace within the year, but should get carbon monoxide monitors right away for safety's sake. Since he could see right away that the furnace was irreparable, he didn't charge us for the visit - and did not give a hard sell for immediate replacement. We took the weekend to discuss timing and I'll be calling Otter to install our new furnace on Monday. read more

I hired Otter for a minor job, just replacing and swapping around some Lutron smart dimmers & switches, hoping to resolve a problem with flickering outdoor lights. I had tried to do this myself, and succeeded with a couple switches, but got confused by the wiring in some others. So I finally gave up and decided to hire a professional. I had 3 companies come do consultations and provide quotes. I liked the guy from Otter the best, because he seemed to understand the problem and seemed honest. An electrician from a different company was clearly BSing me, and I didn't want to deal with someone who wouldn't be up front about what details they're unsure about. Otter also gave a very reasonable quote, compared to another company that also seemed very competent, but was twice the cost. We scheduled for a few days later. Otter showed up on time and did the job efficiently. The main electrician doing the work was really nice and respectful and did the job well. I would definitely recommend them. At least for me, they provided good value and seemed to just want to do the job well and make sure I was happy. read more

Working with the entire Otter team has been an absolute delight! - Bella responded immediately to my request for service and helped schedule the initial visit. - Ali was incredibly insightful and communicative during his initial visit; and also followed up promptly with a quote for the work that we needed to be done the same day of his visit. - Andrew provided exceptional support in getting our repair scheduled, especially considering our ever-changing availability. - Finally back to Ali who performed the actual repair - high quality work, and even went above and beyond with installing a piece of Sheetrock to cover the hole. I highly recommend the Otter team! read more

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Otter HVAC is professional, knowledgeable, straight forward. The energy came the same day I called as they are very cautious of time and needs. They are all over fantastic! Will call them again. What a great find of professional . read more

A couple months after my initial furnace repair, another part of the furnace failed. Unfortunately, it was still cold in my area and I needed a fix ASAP. Ali came out to take a look and offered to replace my furnace while crediting the amount I had already paid for the initial repair toward the replacement. As with my previous experience, they were fast and professional. There was a small mix-up with the equipment installation, but they came back on the weekend to take care of it quickly. I really appreciate the hard work. read more

I was in search for professional help for a mini split installation. Ali and his team were great, providing guidance and detailed explanations throughout the entire process. The price was very reasonable and affordable, ensuring the entire installation is up to code. I would maybe reduce half a star as there was minor miscommunication in the beginning which we quickly aligned, however, I am glad to round it up to 5 stars after seeing the project completed in a timely manner. As a company that's just started, I would highly recommend Ali and his team for any electrical/hvac jobs!! read more

Otter HVAC - Heating & Air Conditioning/HVAC Near Me - Walnut Creek, California

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The team at Otter HVAC was excellent. I needed a mini-split system vacuumed and recharged. They arrived promptly to assess the work and provided a fair, transparent quote. The job was completed the very next day, which we greatly appreciated given the unusually cold weather and the fact that we work from home. Throughout the process, the team was honest, friendly, and highly communicative. I typically obtain multiple quotes and invest considerable time in selecting the right professionals for any project. I'm pleased to say that I've found my go-to HVAC company moving forward. read more

Fantastic service came by last minute to check out of really complicated system in our old building. Very professional and friendly can't thank them enough for their help! read more

Otter HVAC provided excellent service from start to finish. They responded quickly and scheduled the visit without delay. The technician was knowledgeable, professional, and took the time to clearly explain the details of the work, which I really appreciated. The office staff was also very responsive and helpful in answering all my questions. Overall, a smooth and positive experience--I would definitely recommend them. read more

I have an old 1988 gas Rheem furnace with electric ignition that would not turn on. I scheduled an appointment and Ali arrived within the time specified and was able to fix the problem with minimal cost. Thank you Ali!! read more

Otter HVAC was fantastic to work with. They replied to my Yelp inquiry almost immediately, came out to my home quickly, and walked me through all my options without any sales pressure. Extremely polite, courteous, transparent, and clearly knowledgeable. Highly recommend! read more