Castillo Julio Antonio

No ratings collected yet Ontario, California

750 E PLAZA SERENA, Ontario, CA 91764, USA

License checked License #844311 22 yrs experience

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

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When an air conditioner stops cooling in the middle of an Ontario summer, or a furnace refuses to start on a chilly winter evening, people start searching for AC Services and an HVAC contractor near me. Castillo Julio Antonio serves homeowners and property owners in Ontario, California, handling the heating and cooling problems that come with life in the Inland Empire.

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 Heat Pumps in Ontario Furnace Services in Ontario Thermostat Services in Ontario Emergency HVAC in Ontario Maintenance & Tune-up in Ontario

Service Area

Ontario, California All of California

Location

About Castillo Julio Antonio

The business offers AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Typical work includes inspecting electrical connections, checking refrigerant levels, cleaning condenser coils, and testing airflow through supply and return ducts. For furnaces and heat pumps, technicians examine burners, igniters, and controls, while thermostat work often confirms that settings and wiring match the equipment. Emergency calls focus on restoring basic comfort safely before permanent repairs are planned.

Castillo Julio Antonio holds California contractor license #844311 and has been licensed since 2004, bringing more than 22 years of experience in the trade. Ontario homeowners depend on dependable equipment, since hot summers and cold snaps place steady demands on cooling and heating systems throughout the region.

Before choosing an HVAC professional, compare several local businesses, ask for written estimates, and confirm the license number on the state registry. Learn more about Castillo Julio Antonio and its services through HVAC Service Fast.

Frequently Asked Questions

What services does Castillo Julio Antonio offer?

Castillo Julio Antonio offers AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Customers can contact the business for help with cooling, heating, and ventilation needs.

What areas does Castillo Julio Antonio serve?

Castillo Julio Antonio serves customers in Ontario, California. Anyone outside the area should confirm service availability before scheduling.

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

Check that the contractor holds a valid license with the California contractor registry and ask for proof of insurance. Compare written estimates from several local companies before making a decision.

What should I check before hiring an HVAC pro?

Confirm the license number, read recent customer reviews, and ask whether the estimate includes parts, labor, and warranty terms. Make sure the scope of work is written down before any work begins.

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

Call a professional if your system short cycles, makes grinding or banging noises, produces uneven temperatures, or raises your energy bills without explanation. Gas odors, a furnace that will not ignite, or a unit that has stopped entirely also warrant prompt attention.

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HVAC Service Fast is an independent HVAC directory and is not affiliated with this business. Listing details are compiled from publicly available information and may be incomplete or outdated. We do not endorse or guarantee any provider — please verify licensing and insurance directly. See our Disclaimer.