I can't thank Dennis's Heating & Cooling enough. Our heater stopped working a few weeks ago, which just happened to be on one of the coldest days of the year. My wife works from home and was not happy because our house was freezing. We needed service fast. I found Dennis online. After a quick call, I was amazed how fast he was out to take a look at our heater. It turned out the problem was a faulty igniter. Dennis had the problem fixed fast. He also did some general maintenance, including changing our filter, fixing a leaky duct, and making a few adjustments to our thermostat. Everything now works perfectly. I was impressed with the service and fair pricing. Dennis is also a super nice guy. The wife and kids were happy to have our house warm again. I would definitely use this business again. If you need any heating or air conditioner service in San Francisco, definitely give Dennis's Heating & Cooling a call! read more

Dennis's Heating & Cooling - Heater in San Francisco - Heating & Air Conditioning/HVAC Near Me - Concord, California

Dennis is extremely reliable and quick~! I reached out yesterday b/c the heater wasn't working in one of our units. Dennis was accommodating, quick and reliable. He just left and the heat is back on. Thank you!! read more

Be careful of this guy! We had him come out to look at our air conditioner in the heat last month, as it wasn't blowing out cold air. He spent a total of 20 minutes at our house, and spent most of the time chatting with my wife. He spent a couple of minutes hosing off the outer grill of the air conditioner with his 'special cleaner'. My wife saw it, and it was a basic cleaner you can get anywhere. He charged us $750! My son's brother-in-law works in air-conditioning and heating and said we were scammed and that all you ever need to do is shut your system off, hose off the grill, and restart it. $750 for 20 minutes and spraying down the outside of the unit? Are you kidding me? Be careful of this scammer! read more

My mom called him and was able to secure a same day appointment to look at her heater. He was on time and very easy to work with. He solved our issue quickly and we would definitely recommend his service to anyone looking for an honest repairman. Five stars all the way!!! read more

My heater stopped working out of nowhere and in a quick phone call, Dennis's Heating & Cooling was kind enough to instruct us on how to fix our heater over the phone. It was a quick 2 minute phone call and our problem was solved!!! Cannot express how grateful we are for their generous service. I highly recommend!!!! read more

This is my second time using this company and again so glad to have dealt with Dennis. He is such an amazing and honest human being, which is rare nowadays. So happy that my neighbor recommend him to me. Love that he is local here in San Francisco and really goes out of his way to do the service the same day. Now we are nice and toasty again. Thanks Dennis! read more

Dennis was super nice, came out fast. Would hire again if I had an issue with my HVAC

Called yesterday and the tech was here at 7:30 am just like they told me with a bill at half the cost I was expecting. Prompt, professional, courteous, and trust worthy, don't go anywhere else believe me I've been there. I trust them with my home and business. Donnie Miller, SW Performance read more

Dennis is a great repairman. Took a look at my gravity heater and found the problem and had it fixed quickly. Thank You so much! read more

Dennis is quick, professional and kind. I used his service twice now-back to back years for a 20+ year old furnace. This small business is run properly with customer service focus backed by family values and decades of experience. If you want prompt service, efficient and effective work while dealing with reliable and timely responses, this is the place to consider. read more

Great support at little to no cost... Dennis was onsite within the hour only to find the cover was off the air heater. Without the cover the heater automatically shuts down, well who knew, Dennis knew.. It was a quick, easy, affordable fix. Next heating & cooling issue, Dennis will be the first to be called and highly recommended to friends, family and neighbors. read more

Dennis is the man for the job! He was able to come out to light our 1940's gas heater's pilot light promptly. PG&E couldn't do the job for another 10 days. He's a delight to work with and takes great pride, as he should, in providing personal and professional service. I highly recommend doing business with Dennis's Heating and Cooling. 5 Stars! read more

I called Dennis to get a quote, and he ended up guiding me through a DIY repair - even though it meant him not getting my business at this stage. He'll certainly be my "go to" when I have something that goes above my ability, as he's earned my trust! read more

Dennis is the man in every way. Got to us quickly, diagnosed a busted igniter within seconds of checking out the furnace, and was reasonable price wise. I can't recommend him highly enough! read more

Dennis is a true master of his craft and some proprietor of his business. I was lucky to catch him when my furnace started acting up; he managed to make it over the same day. He's a skilled listener, both to his customers and the various sounds an HVAC system might make. He fixed my issue, and made sensible advice on what to invest in (and not invest in). He also takes pride in details, and found some additional loose ducting downstream of the furnace and taped it up to improve air loss. Left furnace in better shape than before it broke. Highly recommended. read more

Dennis is legit. What I thought might be new gas furnace installation, turned into a simple problem fixed in 20 minutes. Honest, experienced, knowledgeable and on time. read more

We had 2 old wall heaters in our in-law apartment that we asked Dennis to diagnose. He was able to fix one issue on the spot and gave a quote to fix the second one. He was transparent, letting me know the best strategy to ensure safety and efficiency. He didn't push for upgrades although when prompted, he agreed that our furnace wasn't the best quality. I'll be calling Dennis to optimize our heating soon! read more

Replace furnace. Job done the next morning and the heat was back!On time, No mess -- took away old 50 year old furnace. I recommend this guy. read more

We have a console heater that needed repair. Dennis came out and fixed our problem within the hour. He was very knowledgeable and fair priced. I highly recommend his services read more

I would like to take this opportunity to say thank you to Dennis and Moses for the amazing job they did repairing our heater. They were on time, never delayed or late, and very professional. Both of these men were extremely competent and confident in their craft. I appreciate how fast they identified the issue and how quickly they resolved the issue. The price was very fair for the services provided. I felt as if I was dealing with long time friends and family. Without pause or delay I would highly recommend this business to anyone in need of heating and cooling service. Great company! read more

I had an issue with my wall heater, and I could not have found a man with more integrity to do the job. He was accommodating with my schedule, arrived promptly, quickly diagnosed the problem, and safety checked everything. He even made adjustments to save me costs with gas usage, and is an overall professional and kind individual. He will not overcharge you and you'll be glad you gave him a call! read more

I have some rental property that I've been managing for the Estate. I've gone through three companies with furnace inspections and replacements. The only company that measured up was Dennis's Heating and Cooling. He was quick to respond and arranged an appointment the next day. He identified two units that needed replacements and scheduled the work quickly. I don't have enough compliments to describe Dennis and his skills, work ethic, and service. He's on my speed dial now. read more

Dennis was great at fixing our broken furnace at the end of the holiday weekend. He came out super quickly, was friendly and professional, quickly identified the source of the problem and fixed it, and went above and beyond (even changed the batteries on our beeping carbon monoxide alarm we hadn't been able to find!). We are so happy to have a warm house again! read more

Dennis is awesome. On time, responsive and professional. Will definitely recommend friends and family.Highly recommended.

Dennis was so awesome... immediately responsive and came the same day (even on a holiday). He discovered something the maintenance and management in our building failed to recognize. My heater was producing large amounts of carbon monoxide. Thanks to him, I now know it needs to be replaced and never to use it again. My Christmas hero! And he's just a really nice guy... Highly recommend! read more

Dennis for the win! Our water heater and furnace for a rental unit both went out unexpectedly, while we had short term tenants. I called a number of different service providers who weren't available for at least a week. Except Dennis who made time for me at the end of his day. Before confirming the appointment, he was transparent with his fees, which was appreciated. No surprises there. He called to give a heads up when he was on his way. He quickly established that our thermostat was miswired and broken (probably never worked - it's a top floor unit so gets quite warm during the day), and he replaced it on the spot. As for the water heater, he also quickly diagnosed and showed me that it was fully corroded and needed a full replacement. He gave me a quick quote and also suggested other financial options to consider. All in all. Great service by a transparent and hard working guy. Plan to call him if I have issues with my other rental units. Highly recommended. read more

Had 2 new Williams wall heaters recently installed to replace 30 year old equipment. One wall heater's vent limit switch kept tripping and needed a reset after the heater ran for over 30 minutes. Original installer felt that maybe the chimney flue pipe needed replacing. We were referred to Dennis who handled small jobs and was familiar with the units. He came out within 24 hours and he and his partner immediately diagnosed the problem. We needed a new vent limit switch, that there were two versions and we needed the other option. We were also concerned about wall moisture and possible roof leakage. Dennis checked for leakage and caulked areas around the flue. We had no roof leaks but condensation was possible around areas where heat and cold air exchanged. He needed to obtain parts but completed the entire job on the same day within 3 hours. Dennis was very polite and answered all our questions. read more

Called Dennis because my wall heater was not working. I couldn't figure out what was wrong and was frustrated. Dennis was able to figure out the problem over the phone and walked me through the steps to fix it. He was very knowledgeable and nice. My heater is working again. Thank You Dennis! Highly Recommend! read more

Dennis was great - quick response and communicated well. The issue ended up being a tripped switch, which he quickly fixed. Given it was just a switch, he was also kind enough to not charge me anything! A+ read more

I am very grateful to have found Dennis to fix an older Day and Night (Carrier) heater while I was in town for the weekend. After my initial troubleshooting thinking it might be the flame sensor, I called Dennis, described what I saw/heard and sent him a photo. He suggested a few things to try but ultimately it needed a new circuit board which despite a mix up from his usual supplier he was able to quickly track down a new one within a few hours (he told me he keeps all the parts he needs on board his truck but he noticed when he pulled out the "new" circuit board from the box it was actually used and he worked hard to try to get me another one asap which was very helpful as I told him I was scheduled to leave town). Dennis really knows his stuff having been in the business 30+ years, but what stood out to me is that he is an overall calm and clear communicator, timely, and has simple upfront pricing- he shared potential options of what the problem might be and associated price - I appreciate this so I don't feel trapped into paying for a potentially overpriced repair/part/service on the spot and the tech is saying subtle things to instill fear as my machine is splayed open like some other HVAC companies I've worked with. He doesn't try to upsell you on anything you may not need and is willing to explain what he is doing for those who are curious like me. If you're looking for an efficient local pro who will fix your HVAC right the first time please give Dennis a call. read more

Dennis Heating and Cooling did an excellent job at getting my heater back in service. Dennis and Moses, were extremely professional, delivered the product and services that were in the service agreement, and gave me some educational-preventative maintenance tips to prolong my heater. Also, they arrived at the job site early, and left it better than they found it. I definitely will be using Dennis Heating & Cooling again. read more

Immediate response, early arrival and incredibly fast service - highly recommended. Dennis is the person to call for all matters heating.

Dennis answered his phone right away and came over as promised at time promised. Took really good care of my heater and had it running in no time. Very professional, courteous and took the time to explain what was going on. I will for sure use his service in the future. Can not go wrong! read more

We decided to upgrade to a Nest thermostat to our older furnace, however the wiring was not as expected and we ended up with a cold house. I reached out to Dennis and he came first thing the next morning and sorted us out right away, now our home is warm again. Dennis is a great guy and an expert professional - we highly recommend his services for your HVAC needs! read more

Dennis has been taking care of our small commercial office building in SF for a while now. He has installed two furnaces, and comes by to replace filters, fix thermostats, and more. He is very personable, easy to reach and very knowledgeable. I feel I'm in good hands with him, that he won't rip me off and I definitely recommend him to others. When our restaurant tenant downstairs couldn't get anyone to return his calls, I connected him with Dennis who came out immediately and fixed the problem at a reasonable price. read more

My uncle's a/c went out and I reached out to Dennis's Heating & Cooling. They offered us a same day or next day appointment. They came out the following day and found the problem in less than 5 minutes! Very affordable and customer service is excellent! Dennis's Heating & Cooling will be my go to for any future a/c issues. read more

This is not your normal review because I did not, as yet, use Dennis' services. I had to cancel and re-evaluate what I was doing. But, Dennis was very helpful over the phone trouble shooting my HVAC issue and gracious when I needed to cancel. I have worked with many HVAC suppliers and most of the time I feel as if I am in a matrix of switchboard operators, bosses writing extravagant estimates which do not jive with the man on the job, and the man on the job doing just the best he can. We consumers are not stupid and know when we getting poor/expensive service because we live in SF. Ever had a phone operator tell you they don't service your area code (waht?) when they dont want your particular job (not big enough). Dennis owns and operates his own business, feels like a local, and I am sure I will have him wrestle that HVAC beast in the basement one of these days. read more

Dennis replaced our furnace and did all the duct work. He was very helpful guiding us through the process from the beginning and gave us a very competitive price compared to other estimates we got. He completed the work on schedule and did a very professional job. Thanks again for the great work Dennis! read more

Dennis just came over and fixed our console gas heater in our apartment in San Francisco. As other reviewers have said, he truly is a master of his craft and of the 20 or so calls I made to get my heater fixed I found the perfect guy. If I could give him 10 stars I would. His prices are beyond fair, his knowledge is extensive, his response time is excellent and I highly, highly recommend him. Thank you Dennis!!! read more

I called Dennis's Heating & Cooling for our furnace problem at the Shipyard condo. Dennis was able to come on the same day and helped solve the issue quickly and easily. Dennis is a very good, nice and friendly person. Also extremely helpful and reasonable!! I can't thank you him enough. I strongly recommend Dennis without any reservation. read more