As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT FWD WINDOW OVERHEAT LIGHT ON GROUND. FOLLOWED QRH, TURNED OFF FOR 5 MINUTES, LIGHT CAME BACK ON. ACFT GROUNDED. LEFT WHCU LOGGED P5-9 CONTROL POWER FAULT. COULD NOT DUPLICATE MALFUNCTION. LEFT WINDOW HEAT OPS CHECKED NORMAL IAW FIM 30-41 TASKS 802, 813 & 814.