Washer displays E66; heater relay fault; no heating or intermittent heating.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed heater relay on main control board, Burned relay contacts, Cold solder joints on board, Excessive heater current draw

Safety: Disconnect power.

Check heater current draw (professional): A technician can verify if the heater is drawing normal current.
Board replacement: If the heater and wiring are good, replace the main control board.

Professional Required 5/5

Main Control Board

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