As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L SIDE WINDOW HEAT OVERHEAT LIGHT CAME ON DURING DESCENT AT 9000' TURNED WINDOW HEAT SWITCH OFF. LIGHT WENT OUT. TURNED SWITCH BACK ON. LIGHT STAYED OUT AND WORKED NORMALLY. GROUNDED - YES. PERFORMED BITE TEST ON LEFT SIDE WINDOW HEAT CONTROL UNIT, FAULT HISTORY LOGGED "WINDOW SENSOR" FROM LAST 8 LEGS REF FIM 30-41 TASK 801. ACCOMPLISHED FIM 30-41 TASK 811, TEST PASSED. DUE TO HISTORY AND PRECAUTIONARY, REMOVED & REPLACED LEFT SIDE WHCU AND PERFORMED GOOD INSTALLATION TEST REF AMM 30-41-11.