Diamond Air Services - Ontario, CA

5.0 (418 reviews) via Google · checked Jul 4, 2026 Ontario, California

1630 E Francis St

Carrier Factory Authorized Dealer License checked License #1047483 8 yrs experience

Verify this license yourself at the California Contractors State License Board (CSLB).

+19097136644

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When the high temperatures of Southern California hit, residents in Ontario need reliable cooling solutions to maintain a comfortable indoor environment. Diamond Air Services provides professional support for homeowners and businesses, focusing on efficient climate control that helps manage the heat effectively. Whether you are dealing with a sudden breakdown or preparing for the changing seasons, having a dependable partner ensures your indoor air quality remains consistent and your systems run at peak performance.

Rating

5.0★

418 reviews

Local market — Ontario

HVAC pros here

Have a website

17%

Cooling demand

1,709

Heating demand

1,537

Cooling/heating demand = annual degree days (NOAA). Electricity = state residential average (EIA).

Services Offered

AC Services in Ontario Heating Services in Ontario Ductwork Services in Ontario

Service Area

Ontario, California All of California

Location

About Diamond Air Services - Ontario, CA

Diamond Air Services specializes in comprehensive AC Services and Heating Services designed to address the unique climate demands of the region. Their technicians handle everything from complex system installations and refrigerant adjustments to preventative maintenance and furnace repairs. By utilizing precise diagnostic tools and quality components, the team ensures that every repair or installation is completed with attention to detail and long-term durability in mind.

Serving the Ontario community, the company understands the specific infrastructure challenges found in local neighborhoods and industrial areas. Their commitment to technical excellence allows them to troubleshoot issues quickly, minimizing downtime for your property. When you are ready to compare local pros on HVAC Service Fast, keep these quality-focused standards in mind to ensure your home stays comfortable year-round.

Frequently Asked Questions

What services does Diamond Air Services offer?

Diamond Air Services provides professional AC Services and Heating Services to meet your climate control needs.

Which areas does Diamond Air Services serve?

They primarily serve the Ontario, California area with expert HVAC solutions.

How do I choose a licensed and insured HVAC contractor in Ontario?

Always verify that your HVAC contractor near me holds a valid state license and carries adequate liability and workers' compensation insurance.

What should I check before hiring an HVAC professional?

Review their service history, confirm they have experience with your specific equipment type, and request references or verified local reviews.

What are the signs it is time to call an HVAC professional?

You should contact a technician if you notice uneven cooling, unusual grinding noises, rising energy bills, or if your system fails to reach the set temperature.

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Reviews

This business also has a 5.0★ rating from 418 Google reviews.

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