1. Black Diamond Heating & Air Conditioning

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Oakley, CA

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Black Diamond Heating & Air Conditioning

3.9 (15 reviews)
Open • 8:00 am - 5:00 pm

Services - Black Diamond Heating & Air Conditioning

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3 years ago

They never returned our phone calls and e-mail. We drove to the address listed and they are not there.

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Review Highlights - Black Diamond Heating & Air Conditioning

“Mike Brown's level of expertise, professionalism, and his high level of integrity were outstanding.”

Mentioned in 8 reviews

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Elite Comfort Systems - We treat every customer as if they were our own mother.  #HVAC #Repair #Installation #Air #Conditioning #HVACMaintenance #AirDuctRepair

Elite Comfort Systems

(224 reviews)

We are once again extremely pleased by Elite Comfort Systems. They are a top quality service Air…read moreand Heating company. This recent visit was a warranty service call and the response, service, workmanship and expertise always exceptional !!! Thank you to our technicians "Ossie" and "Anthony" for their professionalism, explanations, quality work and testing to ensure a good outcome. Thank you Vic, Ossie, Anthony and the Elite team. Stacy & Robert Miller

I was a new homeowner in 2022 when Vic (the owner) and his company, Elite Comfort Systems, saved my…read morefamily (including the feline members) from sweltering in 100+F degree weather by diagnosing and repairing my air conditioner. Since then, they've serviced the almost 22 year old system at my home, nursing it along. With each semi-annual "check-up" service, they advised me on what I needed to do, and what could wait. When funds were tight, they suggested stopgaps to help. Because of this history, when Alex showed me that my heater was leeching carbon monoxide into my home, I knew I could trust him. While I waited for my appointment, I was provided with space heaters gratis. This IS an independently owned business, and they treat customers like family. Ozzy (Osvaldo) and Anthony installed a new heat pump and air conditioner for me last week. They were at my home three days. Not only were they professional, friendly, and polite, they were also respectful of my home--taking time EVERY day to cover my carpeted areas, covering their boots as they came into and exited the house, and cleaning up any installation debris before they left each day. Ozzy and Anthony discovered that a part of the original system was not going to work as efficiently with the new system (the dampers) given the difference in the size. Ozzy explained the difference to me, noted the cost, and the pros and cons. He didn't pressure me to upgrade the items but he made sure I had enough information to make a decision. At the end of the installation, Ozzy took the time to show me how to use the new digital thermostat controls and gave me tips on how to use the system economically. He provided me information on how to follow up if there were ever any problems. Just like other times, Vic called a few days later to see how things were going (I missed the call, but still...so so kind and thoughtful). It's a lot of money to replace your entire HVAC system, no matter which company you use, but hiring one where you know you can trust the company. Simply put, you'll never have worries about trusting Elite Comfort Systems.

Oakley Heating and Air

Oakley Heating and Air

(17 reviews)

I recently had concrete work done at my house and hired another AC company to move the unit out of…read morethe way. Unfortunately, they weren't able to repair and reconnect the refrigerant lines and recharge the system afterward. After searching around and reading reviews, I found Terry at Oakley Heating and Air, and I'm glad I did! He came out, inspected everything, and provided a quote to repair the lines and recharge the system. He also checked and replaced the air filters inside the house. At an awesome price. I was so impressed with his service that I signed up for twice-a-year service and filter changes. Five-star service all around. Highly recommend Terry and Oakley Heating and Air!

Oakley heating and air is a must when is comes to quality Heating/Air conditioning for your home &…read morecustomer experience. My Husband and I have been using them since we moved to Antioch 3 years ago. We love that they're a local family owned business and they are truly passionate about their work. Patricia in the office is so sweet and makes sure we are set with appointments, or if we are in need of any heating/ air conditioning needs/ have any questions. Terry, the technician, is kind & respectful. He comes to do the routine check up on our home system throughout the year before big weather seasons. Our AC went out last summer and they came out the next day to fix the issue. We were so thankful for the quick repair! Great service & value! We highly recommend Oakley Heating and Air!!

Cali Heating and Air Conditioning

Cali Heating and Air Conditioning

(8 reviews)

I thought I left a review already, but upon returning here, it seems to have either disappeared or…read moremy memory is bad. The reason I'm here is part of my review... Last Fall (or was it the year before?) our furnace stopped working, and I called Cali HVAC for service. They sent Oleg fairly quickly, and he did a good job repairing it; in fact, he proved himself to be very conscientious when, after replacing a circuit board that fixed the problem, he didn't like the way one part on the board was oriented, so he came back and replaced that board with a different one that fit better. He could have left it as is, since it was working, and I probably never would have known. In addition to fixing the problem pretty quickly, Oleg was also very informative and polite, answering all questions with patience and no attitudes. So, now I have moved into a new house, and even though the HVAC works, I want to have them check it out, and hopefully educate me about filters to use, what maintenance it might need, and how to make it quieter.

Sent Cali Heating and AC a message 4th of July morning, it's was supposed to be 110 and our AC was…read moreblowing warm air. Daniel responded within minutes and said we could help, he sent out one of his Technicians, Oleg. Oleg was timely and polite when he arrived, he quickly diagnosed the issue and was able to make the repair immediately. We are now blowing cold air! We appreciate this company and Oleg for helping us out on a holiday. Thank you!

Black Diamond Heating & Air Conditioning - hvac - Updated October 2026

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