As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH L SIDE WINDOW HEAT OVER HEAT LIGHT ILLUMINATED. GROUNDED - YES. TURNED L/H SIDE WINDOW HEAT ON & GREEN "ON" LIGHT ILLUMINATED. ACCOMP WINDOW HEAT CONT UNIT BITE TEST, TEST SHOWS OK. ACCOMP FAULT HISTORY BITE SHOWS SENSOR FAULT FOR L/H SIDE. REF B737-800 FIM 30-41-TASK 801 ACCOMP WINDOW HEAT TEST, TEST PASS REF B737-800 AMM 30-41-00-80-001.