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Blue Diamond Heating and Air, San Diego

HVAC Contractor

When is it open?

Thursday: Open 24 hours

From Google, checked May 2026. Page updated 8 October 2026.

  • MonOpen 24 hours
  • TueOpen 24 hours
  • WedOpen 24 hours
  • ThuOpen 24 hours
  • FriOpen 24 hours
  • SatOpen 24 hours
  • SunOpen 24 hours

What kind of work does it do?

HVAC Contractor

Best Heating and Air in Mission Valley San Diego, California

What do Google reviewers say?

5.0 (900) Google Reviews

Ratings as of August 2026. See this business on Google

Charles arrived on the set time, was very professional while determining our AC situation, made recommendations which we agreed with and his service and technical skill solved our issues..! Thank you Charles for a job well done..! Would highly recommend this Blue Diamond HVAC service!

5 out of 5 Michael T.

Very professional and accommodating. After thorough inspection of the water leaks of my split AC unit, Charles from Blue Diamond Heating and Air was straight forward regarding the damaged of the AC Unit and I was given different options.

5 out of 5 Rey R.

Blue Diamond and Osvaldo was the only company that was willing to repair my current mini split issue saving me thousands of dollars. Other companies simply wanted to replace the entire system.

5 out of 5 Jonathan

These quotes come from Google Reviews and belong to their authors. They can be out of date. Ask for a correction or removal.