Blue Diamond Heating and Air
HVAC contractor in San Diego, CA.
In Blue Diamond Heating and Air's own words
Blue Diamond Heating and Air is a trusted HVAC company serving homeowners and businesses throughout San Diego, CA. We specialize in heating and air conditioning installation, repair, and maintenance, delivering reliable comfort solutions tailored to Southern California’s climate. Our experienced technicians work with all major HVAC brands and provide energy-efficient options designed to improve indoor comfort and lower utility costs. Committed to honest service, quality workmanship, and customer satisfaction, Blue Diamond Heating and Air is your dependable choice for year-round comfort in San Diego. Contact us today to schedule all types of HVAC services in San Diego.
- Trade
- HVAC contractor
- Business address
- 1110 Tourmaline St, San Diego, CA 92109, USA
- Telephone
- (619) 393-9045
- Website
- bluediamond.tech
- Hours
-
- MondayOpen 24 Hours
- TuesdayOpen 24 Hours
- WednesdayOpen 24 Hours
- ThursdayOpen 24 Hours
- FridayOpen 24 Hours
- SaturdayOpen 24 Hours
- SundayOpen 24 Hours
From Google, checked May 2026
- Register
- CA register
Recorded as supplied and as found in public sources. This register makes no credential or quality claim about any business; check license status with the state board.
Google Reviews
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Conscientious calm polite efficient knowledgeable and very professional Impressive!
dennis R.
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Blue Diamond is great! Very respectful when entering your home by covering their shoes. They make sure you know what they’re doing and tips to keep your ac system tip-top.
Sue M.
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Alecko came out and was super helpful and knowledgeable. I had a ton of questions and he was more than happy to walk me through what he was doing and how to diagnose the issues. Offered a couple different solutions and was willing to make it work with my budget. Took his time to make sure the fixes took effect and even went out of the way to help try and clean up the place after he noticed some dust on the ground from when he had to access the attic. AC is working great now.
Anthony Y.
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Always very helpful!
Kristi G.
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The mini split pump made a loud noise and was fixed by Alecko. He took his time.
Rob H.
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Thanks to Blue Diamond for handling my issue. From Courtney on the phone keeping me updated, to Osvaldo and Manny coming out and replacing my capacitor. Everyone was professional and respectful. I would recommend them to family and friends and definitely hire them if needed in the future.
Steven W.
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Great and fast service! Thanks so much!
Sonja H.
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Alecko was personable and thoroughly explained what the issues were for my a/c unit. He also gave me helpful advice on how to protect my unit. If you get Alecko as your tech, you are in good hands.
Valeri O.
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Donovan, was very thorough. Explained everything is simple terms. We are going with the year maintenance
Steve R.
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Prompt, very courteous, totally respectful of our home & my ignorance about the thermostat. Corrected the difficulty with no fuss or drama. I will gladly use this company for any other Heating & Air problems in the future!
Christy K.
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Always great service! Thank you
Michele C.
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Everyone is very professional and helpful. We have never had a bad experience and would highly recommend Blue Diamond.
Bernadette L.
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Osvaldo was very kind and explained things well. He treated me with respect which was a welcomed change as a female business owner. He found the problem quickly and showed me how to upkeep the maintenance on my mini splits. Definitely would recommend Blue Diamond Heating and Air.
Ruby M.
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As usual the tech (Alecko) took care of the a/c problem quickly and efficiently
Gary B.
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Osvaldo did a great job. Would highly recommend
D. V.
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Blue Diamond's service is great. They arrive on time, very courteous, and are professional. I had an negative experience with another HVAC company and Blue Diamond came out and resolved issues that were not addressed by the first company. I have been calling them ever since to install new systems and do maintenance. I highly recommend their company.
Rosemary K.
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Charles Jones came out to perform our twice yearly maintenance on our mini split. Besides being knowledgeable and personable, the service was fantastic and he pointed out that I may have an issue not related to my HVAC, but my roof which I am grateful he did. thanks, blue diamond as usual top-notch service!!!!
Frieda M.
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Blue Diamond Heating and Air is the best HVAC company out there. Join their maintenance plan. They come out twice a year and check your system. Charles educates you on what is going on with your unit. You are in good hands when you use Blue Diamond for all your Heating and Air needs. They take good care of their customers!
Cara G.
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We had Charles come out and perform an annual maintenance on our AC unit. He was very courteous and thorough. We were very pleased with the whole process.
Laura G.
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Always exceptionally thorough and knowledgeable.
Ana R.
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"Charles from Blue Diamond came out to service our HVAC system and did an outstanding job. He thoroughly inspected the unit and ensured it was operating at peak performance. He cleaned all components and confirmed everything was properly prepared for the summer season. We are enrolled in their monthly maintenance plan, which has proven highly effective at keeping our system running as efficiently as the day it was installed."
Travis M.
About Blue Diamond Heating and Air
HVAC services in San Diego
Blue Diamond Heating and Air provides heating and air conditioning installation, repair, and maintenance. The company says it serves both residential and commercial clients throughout the San Diego area. Its technicians work with all major HVAC brands to provide energy-efficient options intended to manage utility costs and indoor comfort.
According to the company, its work is tailored to the Southern California climate. For local context, per the American Community Survey, utility gas accounts for 51% of the heating fuel used in San Diego. NOAA normals for the area show a mean temperature of 62.5 degrees F.
Ratings and availability
The company maintains a 5.0 rating based on 87 reviews. Reviewers frequently mention that the technicians are knowledgeable, professional, and respectful of the home environment. Some customers noted that staff members took time to explain technical issues and provided advice on system maintenance.
Blue Diamond Heating and Air operates 24 hours a day, every day of the week.
Professional HVAC support
The business specializes in several specific areas, including air conditioning repair, furnace repair, and general heating contracting. It describes its approach as focused on quality workmanship and honest service for year-round comfort.
Blue Diamond Heating and Air operates in San Diego.
Services, brands and warranty details come from the company's own website. Ratings, hours and reviews come from Google. Town figures come from the US Census and NOAA.
More HVAC contractors in San Diego
About San Diego
| Population | 1,406,106 (2025) |
|---|---|
| County | San Diego County |
| Average yearly snowfall | 3.5 inches |
| Heating degree days | 1,994 |
| Most common heating fuel | Utility gas |
Sources: U.S. Census Bureau. NOAA U.S. Climate Normals 1991-2020.