Our AC went out in the middle of a heat wave- yuck! This company was assigned by our Home Warranty company and we were happy to get them as they had helped us several years ago with a different AC issue. David called to let us know he was on the way and arrived when he said he would. He quickly diagnosed and repaired the issue. We highly recommend David and His Team! read more

I had Diablo valley heating and air conditioning service my AC today, David was his name he called about 20 minutes before he came over very friendly And went right to work trying to find what was wrong with my unit. His hardest problem was trying to see what Freon my unit took and after making several phone calls got the answer he needed. He added the correct Freon and also changed 2 valves For me, he check inside too and all was well thank you David and Diablo valley heating and Air. Gil Britto read more

David always does a great job. He's efficient, friendly, and gets the job done right.

Was assigned David and Diablo Valley Heating and AC from our Fidelity Home Warranty Service when our AC stopped working. Had to wait for an appt two weeks later but we have fans in all of our bedrooms and living area so we survived the 90s temps. It was worth the wait. David figured out that a previous service call from another HVAC company had put in the wrong voltage capacitor that eventually stopped our compressor from turning on. He then checked and added more Freon to our system (when I asked the last service guy he said that we didn't need to add any although he never took a reading). Then David asked me if I had checked my filters in the unit in our garage. I said they were changed about a year ago. He checked on those as well and found them in ok shape but I should change them soon. David had already asked me more questions than the previous guy who simply changed the capacitor (wrong one mind you) and got out of there for his next call. David said that other service guys talk about how they do 14-15 service calls a day during the busy days but without the thoroughness of the job. David owns his own business and I appreciated his attention to figure out the problem and more. read more

David came out to take a look at our AC system under our fidelity home warranty. Over the past month it had an issue where the compressor would get super loud and the air would quit cooling until the unit was restarted. The issue is fairly random in occurence so I was worried that it would be tough to diagnose. Was very happy that David was able to spend the time figuring out what was going on even though the compressor wasn't appearing broken at the time when he came out. He figured out the motor was running at the wrong amp rating and was able to replace it, hopefully fixing the issue going forward! read more

Called as part of our Home Warranty to fix an AC unit that was not starting. The other companies were taking 2 weeks to come fix this in the middle of summer and 100+ temps. Their 4 hour window was a bit long to wait, but the guy called when he was headed over to let me know, which I appreciated. Repair was quick and professional. The motor needed a new starting capacitor. He also checked the freon level and topped it off to give it more efficiency. I'm so impressed, i'll call them when I need routine service on our other units as well. read more

I would like to recommend David from Diablo Valley Heating and Air Conditioning. My A/C stopped working and my warranty company Fidelity Home Warranty sent him to fix the problem. He called within hours to make appt. He was on time, courteous, and went right to work. He found the problem and had to order a part. He kept me updated and as soon as part arrived, he installed it. I really appreciated the fact that he kept me updated. Only good things to say about this company. Thank you David! read more

David assisted us with a RUSH repair through our home warranty company when the first company disappointed (Russell Heating and Air - see other yelp reviews). Within 30 minutes of calling, he got our heating unit up and running. Couldn't be happier with David and Diablo Valley Heating!! read more

David came out to our apartment to repair our central AC unit. He helped us schedule an appointment that worked with our schedule, called ahead, showed up during the promised time window, and very courteous. Not only did he perform very thorough and careful work, but he took the time to clearly explain what caused the issue and what the repair entailed. We were quite impressed and now won't have to live in an East Bay sauna when the summer hits! read more

He was fast and efficient. Very professional. He had to order a part but called at a perfect time to install it. I was very pleased that the Home Warranty place had chosen him. Other people should not give poor ratings because the Home Warranty people did not honor the repair. Don't kill the messenger. read more

First cold snap in the new house and wouldn't you know it: the heater went on the fritz. David arrived right on time, was professional and personable. He diagnosed the issue, hunted down the necessary part and came back to install it the same day. The parts house gave him a part that appeared to have been used and instead of taking a chance that it might be faulty, David went back to exchange it, turned around and came back to my house to install it all in the same day. Because of his diligence and knowledge, we were back online, toasty warm in no time. I would recommend David and Diablo Heating again and again. read more

Referred by our Home Warranty Company. We just bought a house and discovered that our central a/c wasn't working anymore. David called from a blocked phone # to book our appointment. He was rude and made us wait over a week before he came out to our home. He gave himself a big window to show up for the appointment but never bothered to give me a more accurate ETA so I ended up waiting 3 hours before he arrived. He didn't bother to cover his shoes upon entering our home and seemed like he was in a hurry to get in and get out as fast as he could. He acted as though it was our fault (the homeowner) that the A/C wasn't working, when in fact we just moved into the place. After snooping around he found something wrong with the unit that voided our warranty! He couldn't give me an estimate on what the repair would cost and told me he's too busy to do it anyway! I was told later by another company that he likely didn't want to deal with our unit because it was an older one and because it wasn't as profitable for him now that the weather is getting warmer! Very dissapointed. read more

Great honest service. David arrived on time, figured out the problem right away and saved me nearly 2 thousand dollars in repair another company had quoted me. I will be back if any other issues come about. read more

Our air conditioning unit went out on a Sunday and Diablo Valley Heating & A/C was contacted by our home warranty company Monday. David called back promptly, but said he couldn't schedule an appointment to come out to check on the unit until Friday. This was very upsetting, as it was averaging 95 degrees in the house everyday. I contact the home warranty company again, but they would not offer a different contractor (they lost points with me). So we sweltered until Friday. David came to the house and said he had to order a compressor and it would take another week. Oh boy! Yes, we waited an additional week -- until the following Friday -- to get our air conditioning repaired. Two miserable weeks. I don't know if this is normal operating procedure for A/C service, as this is the first time I've required it. I do know this is the first time I've ever had to wait be service through my home warranty company. Normally I receive a contractor call immediately and a contractor visit same or next day. In any case, the unit seems to be working now. read more

This company is horrible. We bought a house and the first time we turned the heater on it did not work. Called the home warranty and they sent Diablo Heating and AC. We had a home inspection done prior to purchase and everything worked. The guy came and reported to the home warranty company the unit could not possibly have worked. The say your unit never worked so the warranty will not cover repairs and you have to pay them out of pocket. Long story short I was able to prove it worked during the inspection and Diablo had to fix it. Avoid this company at all costs. read more

After having a different Heating and Air Company show up ask 4-5 questions and tell me our repair was not covered under the home warranty, David came out quickly and efficiently did a proper diagnosis of our air conditioner, and fixed it. The night before he came it was 85 degrees upstairs when I went to bed, after David showed up, the AC worked and we all slept comfortably. Thank you David for you professional help to keep us comfortable. read more

I had a very low heat problem on downstairs and my heating furnace was keep tripping every 5 to 10 minutes causing my thermostat to go blank both 1st floor and 2nd floor. I called my home warranty and opened a claim.On 12/19/2012, Diablo Valley Heating and Air Conditioning came to look at my central heating furnace issue through my home warranty company Fidelity Home Warranty. The technician Mr.David diagnosed and said, there is problem with a zone board which is not causing the dampers to open and zoning systems are not covered by home warranty, so he said, it would cost approximately $500 to replace the zoning board. He said, the damper is opened only for 2nd floor, causing the furnace to over heat and shut down automatically by safety sensors. He also mentioned, after he fix the zoning board, it may have other issues on damper motors or damper operation, which may cost additional, if it happens, like around $800 or so. Since it was too expensive, I just let him go and there was a service call fee of $55 which I paid to the home warranty company. He gave me work order estimate for the potential repairs. I called him to find out how serious is to fix this issue and any fire hazard. He left me a voice mail saying, the system is overheating, which may slowly fail other parts which could be safety sensors, so it is better to fix it soon. I was not satisfied with his diagnosis and so I called him again to get more insight. So I asked him, so even after fixing the zoning system, if I turn on the thermostat on 2nd floor, damper may still open for 2nd floor and may close for 1st floor, which may still cause the same issue, right? He said, he dont know, he have to fix it and then see it, it may open 1st floor if 2nd floor got enough heat, or it may be like the same, every unit is different. I was not convinced about his reply or diagnosis. Something was missing in this whole picture. So, I hired Sears for a second opinion. So, Sears technician Mr.Glenn came on 01/02/2013 and diagnosed the situation. He said, there is no problem with zone board or damper motors or any thing. He found there was some loose bolts which was causing the dampers not working properly. He did a full check on the system, fixed the issue, ran Carbon mono-oxide check, measure the heat from the blowers from first floor and second floor and said, everything looks good. Now, my furnace is working great without any issues. Zoning board or damper motors or dampers or nothing was replaced. He charged $170 for service fee and $49.99 for the repairs. Because of Diablo Heating mis-diagnosis, I would have ended up paying between $500 or $800 for some unwanted repairs, which may not even fixed the issue, as Mr. David was not able to find the loose bolts issue. Because of this, I have to pay Sears $170 + $49.99, which is a total of $219.99. I have the receipts for it including the technician information. If Mr. David would have found this issue, I would have spent only $55 (service call fee through home warranty) and $49.99 (repairs). I would not have paid $170 service call for second opinion and fixing it. I even contacted my home warranty and they said, they do not have any control over the quality of the work the techician performs. On looking into the whole issue, Diablo Valley Heating should refund me back $170.00 which I paid to Sears Heating Repair because he mis-diagnosed the issue on the first time and gave me wrong estimate with higher costs. I already paid the service call fee of $55 to my home warranty for his visit and I am willing to take the $49.99 which I paid to Sears for repairs. But, I should not be spending $170 for Sears service call, which came because of Diablo Valley Heating's mis-diagnosis. read more