Follow each step carefully.
Turn off the appliance and unplug it from the power source.
Remove the access panel and visually inspect the heater element for damage.
Use a multimeter to measure the resistance of the heater element; it should be within specified limits.
Test the thermostat for proper operation; replace if faulty.
Check all wiring connections to the heater element for tightness and corrosion.
Replace any damaged components identified during inspection.
Plug the appliance back in and turn it on to check for error clearance.