LG electric range completely shut down at end of oven cleaning cycle.
Trouble shooting took much longer than repair. Not obvious but a flow diagram in the LG service manual pointed towards a defective bimetal thermostat switch on the range inner back wall. The switch contacts tested bad when cold and this condition locks up the power module board to where it does not supply any DC power to the master contr
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oller board - thereby shutting down all oven operations. Thermostat is accessed after removal of the back panel via mounting screws plus removal/re-attaching unit spade lugs (needle nose pliers) plus removing/replacing the thermostat via one mounting screw. Phillip screw driver needed for panel access and thermostat disconnect. While I did in the course of troubleshooting, there is no real need to remove the oven top unit. Very inexpensive repair.
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