S T W HVAC

No ratings collected yet Walnut, California

1805 N COPPER VALLEY LANE, Walnut, CA 91789, USA

License checked License #968650 15 yrs experience

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

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Walnut, California, sits in the eastern San Gabriel Valley, where hot summers push air conditioners hard and cooler winter nights keep furnaces and heat pumps busy. S T W HVAC serves homeowners and property owners in Walnut and the surrounding community with heating and cooling work that keeps indoor comfort steady through both seasons.

Local market — Walnut

HVAC pros here

Have a website

22%

Cooling demand

1,450

Heating demand

1,429

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

Services Offered

AC Services in Walnut Heating Services in Walnut Ductwork Services in Walnut Heat Pumps in Walnut Furnace Services in Walnut Thermostat Services in Walnut Emergency HVAC in Walnut Maintenance & Tune-up in Walnut

Service Area

Walnut, California All of California

Location

About S T W HVAC

S T W HVAC offers AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Typical work includes diagnosing weak cooling, cleaning and checking coils and blower components, inspecting furnace burners and safety controls, sealing and repairing leaky ducts, installing and programming thermostats, and setting up heat pump systems. Emergency calls cover no-heat and no-cool situations that cannot wait for the next scheduled visit.

S T W HVAC is a licensed contractor under California contractor license #968650, held since 2011, which gives the business more than 15 years of experience in the trade. Its team focuses on clear diagnoses, straightforward explanations, and repairs that address the root cause rather than just the symptom.

If you are comparing local HVAC professionals in Walnut, ask about services, response times, and written estimates before you decide. Visit HVAC Service Fast to review S T W HVAC alongside other nearby options.

Frequently Asked Questions

What services does S T W HVAC offer?

S T W HVAC offers AC Services, Heating Services, Ductwork Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. Each service can be requested for residential or light commercial properties in its service area.

What areas does S T W HVAC serve?

S T W HVAC serves Walnut, California, and the surrounding community. Confirm your address when you contact the company to make sure it falls within the service area.

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

Look up the contractor's license on the California Contractors State License Board website and confirm it is active and matches the business name. Ask for proof of liability and workers' compensation insurance before work begins.

What should I check before hiring an HVAC pro?

Request a written estimate that lists parts, labor, and any warranty terms, and compare at least two quotes for larger jobs. Ask whether the technician is trained on your equipment type and how they handle emergency calls.

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

Call a professional if your system stops heating or cooling, makes grinding or banging noises, cycles on and off frequently, or your energy bills rise without a clear reason. A burning smell, gas odor, or a carbon monoxide alarm means you should leave the home and call for emergency help right away.

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