LG WD-12270FD Service Manual page 37

Disassemble the cabinet cover.
Separate the heater from the tub.
Remove any foreign objects (wire, coin, etc.) by
inserting a long bar in the opening.
Unscrew the 4 screws from the back cover.
Unscrew the single screw from the lower-right
side of the cabinet.
Disconnect the connector from PWB Harness.
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