Thermador Pro-Kitchen Repair · Portola Valley, CA

Portola Valley's custom homes in 94028, on wooded acreage off Alpine Road and Portola Road, run Thermador Pro Grand dual-fuel ranges and Masterpiece downdraft ventilation as often as the mid-century modern houses in the Ladera-adjacent pockets do. The Pro Grand's fan-circuit relay on the control board is a year-seven failure we see regularly, and the giveaway is the convection fan that keeps running after the cycle finishes. On steam-injection Pro Grand ranges, skipping the steam-tank cleanout for more than a couple of years is how the pump ends up dead.

Portola Valley takes fire season seriously, and the PG&E shutoffs that come with it push a lot of hard restarts through these control boards, which we think adds to the relay wear beyond ordinary age. Masterpiece downdraft ventilation loses suction or won't shut off when the blower motor wears out, small enough a change at first that people blame the range before the hood. We pull the blower, replace the motor and control, and verify airflow in about two hours.