As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM: R/T FWD WINDOW HEAT OVERHEAT LIGHT ILLUMINTES WHEN TURNING SWITCH ON. PERFORMED FIM 30-41 TASK 812, MOVED SENSOR SELECT SWITCH TO SECONDARY POSITION AND OPS CHECK NORMAL, CHECKED RESISTANCE ON SECONDARY SENSOR CHECKS OK.