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

    Air Conditioner Repair in San Mateo, CA — Same-Day Service

    Don't sweat through a Bay Area heat wave with a broken AC in San Mateo. Our licensed technicians (CA #49404) service central air, mini-splits, and heat pumps across Baywood, Hillsdale, Aragon. Fast diagnosis, upfront pricing, and a 90-day guarantee.

    (510) 930-0404
    4.9 from 1,100+ reviews 35 min response 90-day guarantee

    Air Conditioner Repair Cost in San Mateo

    Typical Cost

    $150–$600

    Parts & labor included

    Avg. Repair Time

    1–3 hours

    Most repairs same visit

    Diagnostic Fee

    $89

    Waived with repair

    Common Air Conditioner Repair Problems in San Mateo

    AC not cooling properly

    Low refrigerant, a dirty condenser coil, or a failing compressor can reduce cooling. We'll diagnose the root cause and restore comfort.

    AC blowing warm air

    Often caused by low refrigerant, a faulty compressor, or thermostat issues. We'll identify and fix the problem same day.

    AC making loud noises

    Banging, squealing, or grinding sounds indicate fan motor, compressor, or loose component issues. We'll pinpoint and repair the source.

    AC unit leaking water

    Clogged condensate drain lines or a frozen evaporator coil are common causes. We'll clear the blockage and prevent water damage.

    AC short cycling (turning on and off)

    This can indicate an oversized unit, refrigerant leak, or electrical issue. We'll diagnose the cycling problem.

    Thermostat not controlling AC

    Faulty wiring, a dead thermostat, or compatibility issues can prevent proper control. We'll repair or replace it.

    Why Choose Top Appliance Repair in San Mateo?

    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 San Mateo

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

    Samsung repair in San MateoSamsung
    LG repair in San MateoLG
    Whirlpool repair in San MateoWhirlpool
    GE repair in San MateoGE
    Maytag repair in San MateoMaytag
    KitchenAid repair in San MateoKitchenAid
    Frigidaire repair in San MateoFrigidaire
    Bosch repair in San MateoBosch
    Sub-Zero repair in San MateoSub-Zero
    Viking repair in San MateoViking
    Thermador repair in San MateoThermador
    Miele repair in San MateoMiele
    Electrolux repair in San MateoElectrolux
    JennAir repair in San MateoJennAir

    Air Conditioner Repair FAQs — San Mateo

    Manufacturer Resources

    Energy Star AC Guide Carrier AC Support Energy.gov Cooling Tips

    Need Appliance Repair?
    Call Us Today!

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

    (510) 930-0404