As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW OVERHEAT CAUTION ILLUMINATED. GROUNDED - YES. FOUND WINDOW HEAT POWER LEFT SIDE C/B OUT ON P6-12 PANEL. DETERMINED C/B COULD BE RESET PER AMM 20-60-01. WINDOW HEAT OPS TEST NML PER AMM 30-41-11. ETOPS SIGNIFICANT SYSTEM, GROUND VERIFICATION SUCCESSFUL.