As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, L1 WINDOW OVERHEAT LIGHT AND MASTER CAUTION LIGHT ILLUMINATED. ACFT GROUNDED. ACCOMPLISHED FIM 30-41, TASK 801. CURRENT BITE PASSES. DURING FAULT HISTORY ALL LED'S ILLUMINATE ON WINDOW HEAT CONTROLLER. R & R WINDOW HEAT CONTROL UNIT L-1 POSITION. OPS CK GOOD REF AMM 30-41-11 & IPC 30-41-11-02.