Always replace the HIGH LIMIT THERMOSTAT whenever a Thermal Limiter has failed (per LG Service Bulletin)
Part number: AP4440977
As mentioned by the other sharp tech:) ...
*Verify* (don't assume) that the venting (in the home) is indeed clear.
Check the Lint Filter (waxy lint accumulation)
Though unlikely---check the Filter Housing plastic "screen" for accumulation/blocked (airflow to filter blocked)
During winter months---check the outside vent hood (not covered/buried under a snow drift)
Verify that the Door Seal is still attached to the door (not missing).