Error code reference

Whirlpool Oven Error Code F04

WISP protocol doesn't work (communication error between oven power unit and hob control unit).

WISP protocol doesn't work (communication error between oven power unit and hob control unit).

First step from the service manual

Replace Capricorn (oven power unit) or replace Scales (hob control unit).

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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