As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE FORWARD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. FOLLOWED QRH PROCEDURE, NO CHANGE. ACFT GROUNDED. FOUND WINDOW HEAT POWER CIRCUIT BREAKER ON P611 B9 OPEN. WHCU FAULTED BUSS POWER. INSPECTED C/B AND ASSOCIATED WIRING. NO DEFECTS NOTED. RESET CIRCUIT BREAKER, WINDOW HEAT OPS CHECKED OK IAW FIM TASK 30-41, TASK 806.