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Sigma HVAC & Electric Inc

No ratings collected yet Castro Valley, California

2733 DARLENE CT, Castro Valley, CA 94546, USA

License checked License #1128583 2 yrs experience

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

(650) 868-7766
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When an air conditioner stops cooling during a Castro Valley heat spell, homeowners want two things fast: a clear diagnosis and a repair that lasts. Many people searching for AC Services begin with a simple question, such as who can come out quickly and explain the problem in plain terms. Sigma HVAC & Electric Inc is a California contractor that serves residential and commercial customers in the Castro Valley area. The company holds California contractor license #1128583 and has been licensed since 2024.

Local market — Castro Valley

HVAC pros here

11

Have a website

27%

Cooling demand

293

Heating demand

2,531

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

Services Offered

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

Service Area

Castro Valley, California All of California

Location

About Sigma HVAC & Electric Inc

The company's work covers AC Services, Heating Services, Ductwork Services, Electrical Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up. A typical AC visit can include checking refrigerant levels, inspecting electrical connections, and cleaning or testing components such as coils and capacitors. Furnace and heating calls follow a similar pattern, with safety checks and performance testing before any parts are replaced. Thermostat upgrades and ductwork repairs help a system distribute air evenly, which can make a noticeable difference in comfort.

Castro Valley's inland climate brings hot afternoons and cooler evenings, so residents often rely on both cooling and heating throughout the year. Scheduled maintenance can catch small issues before they become expensive breakdowns, while emergency service matters most when temperatures climb or drop suddenly. Local familiarity helps a technician arrive prepared and work efficiently with the layouts found in nearby homes and buildings.

If you are comparing local professionals, ask for written estimates, confirm the license number, and compare the scope of work in each proposal. You can also review the services Sigma HVAC & Electric Inc offers through HVAC Service Fast and decide which option fits your needs.

Frequently Asked Questions

What services does Sigma HVAC & Electric Inc offer?
Sigma HVAC & Electric Inc offers AC Services, Heating Services, Ductwork Services, Electrical Services, Heat Pumps, Furnace Services, Thermostat Services, Emergency HVAC, and Maintenance & Tune-up.
Which areas does Sigma HVAC & Electric Inc serve?
Sigma HVAC & Electric Inc serves Castro Valley, California and the surrounding area. Contact the company directly to confirm whether your address falls within its current service area.
How do I choose a licensed, insured HVAC contractor in Castro Valley?
Start by checking the contractor's license number on the California contractor registry and asking for proof of insurance. Compare written estimates and ask whether the company offers service for your specific system type.
What should I check before hiring an HVAC pro?
Confirm the license, insurance, and any warranty terms before work begins. Ask for a written estimate that lists parts, labor, and the scope of the job so you can compare proposals accurately.
What are signs it is time to call an HVAC professional?
Call a professional if your system runs constantly without reaching the set temperature, makes unusual noises, or produces uneven airflow. Rising energy bills, a burning smell, or frequent cycling on and off also warrant a prompt inspection.

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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.