Serving San Francisco Bay Area | Santa Clara County
    Top Appliance Repair
    Sunnyvale, CA · Santa Clara County

    Gas Furnace Repair in Sunnyvale, CA — Same-Day Service

    Don't go without heat in Sunnyvale. Our licensed technicians (CA #49404) diagnose and repair all gas furnace issues across Old Sunnyvale, Lakewood, Ponderosa — from igniter failures to blower motor problems. Same-day service available.

    (510) 930-0404
    4.9 from 1,100+ reviews 20 min response 90-day guarantee

    Gas Furnace Repair Cost in Sunnyvale

    Typical Cost

    $100–$500

    Parts & labor included

    Avg. Repair Time

    1–3 hours

    Most repairs same visit

    Diagnostic Fee

    $89

    Waived with repair

    Common Gas Furnace Repair Problems in Sunnyvale

    Furnace not producing heat

    A faulty igniter, gas valve issue, or thermostat problem can prevent heating. We'll diagnose and restore warmth safely.

    Furnace short cycling

    Overheating from a dirty filter, faulty flame sensor, or cracked heat exchanger. We prioritize safety on these repairs.

    Pilot light keeps going out

    A failing thermocouple, draft issues, or gas supply problems. We'll repair the ignition system for reliable operation.

    Furnace blowing cold air

    Could indicate a pilot/igniter failure, thermostat issue, or ductwork problem. We'll find and fix the cause.

    Strange smells from furnace

    Burning, rotten egg, or musty odors require immediate attention. We perform safety inspections and necessary repairs.

    Furnace making banging or popping noises

    Delayed ignition, expanding ductwork, or dirty burners can cause loud sounds. We'll eliminate the noise safely.

    Why Choose Top Appliance Repair in Sunnyvale?

    Same-day & next-day appointments available
    Licensed & insured — CA License #49404
    90-day parts and labor guarantee
    Upfront pricing — no hidden fees
    Factory-trained, certified technicians
    OEM parts carried on every truck
    4.9★ rating from 1,100+ verified reviews
    Locally owned & operated since 2016

    Brands We Repair in Sunnyvale

    Our technicians are factory-trained to service all major appliance brands.

    Samsung repair in SunnyvaleSamsung
    LG repair in SunnyvaleLG
    Whirlpool repair in SunnyvaleWhirlpool
    GE repair in SunnyvaleGE
    Maytag repair in SunnyvaleMaytag
    KitchenAid repair in SunnyvaleKitchenAid
    Frigidaire repair in SunnyvaleFrigidaire
    Bosch repair in SunnyvaleBosch
    Sub-Zero repair in SunnyvaleSub-Zero
    Viking repair in SunnyvaleViking
    Thermador repair in SunnyvaleThermador
    Miele repair in SunnyvaleMiele
    Electrolux repair in SunnyvaleElectrolux
    JennAir repair in SunnyvaleJennAir

    Gas Furnace Repair FAQs — Sunnyvale

    Manufacturer Resources

    Energy Star Furnace Guide Rheem Furnace Support Energy.gov Furnace Tips

    Need Appliance Repair?
    Call Us Today!

    Our certified technicians are ready to help. Same-day and next-day appointments available.

    (510) 930-0404