The Best HVAC & Air Conditioning
in Ontario, California

We rank HVAC contractors using our own editorial assessment of each one's reputation and how established it is in the community, drawn from publicly available signals and local knowledge. Providers with a weak reputation are kept out of the top of the list. This is an independent guide — businesses don't pay to be ranked (a paid placement, if any, is always labeled "Featured").

A service call and diagnostic from a local HVAC contractor typically runs $75 to $200, with common repairs (capacitor, refrigerant, fan motor) adding to that. Full system replacement is a much larger job quoted per home. Given the Inland Empire's summer heat, ask about response time when you call.

Every business on this page is an active, independently reviewed local provider with a working phone number. Tap the call button on any listing to reach them directly.