Washer-dryer combo shows E66; dryer heater does not energize.

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, Open circuit in heater wiring, Shorted heater causing relay damage

Safety: Disconnect power.

1. Test heater element: Measure resistance of the dryer heater. Replace if open or shorted to ground.
2. Inspect wiring: Check for burned or loose connections between the control board and heater assembly.

If the heater and wiring are good, the main control board relay is likely faulty and the board should be replaced.

Professional Required 5/5

Main Control Board

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