Washer shows E66; heater relay failure detected

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, Shorted heater causing relay damage, Burnt control board traces

Safety first: Disconnect power before working on the control board.

Inspect heater circuit: Test the heater element for shorts to ground. Replace if defective.
Inspect main control board: Remove the board and examine the heater relay and surrounding area for burns or cracked solder joints.
Replace main control board: If the relay or board is damaged, replace the entire control board with the correct Frigidaire part.
Re-test heating: After reassembly, run a hot wash cycle to confirm proper heating and that E66 is cleared.

Hard 4/5

Main Control Board

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