As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L2 WINDOW OVERHEAT LIGHT ILLUMINATED IN FLIGHT QRH PROCEDURE FOLLOWED AND LIGHT REMAINED EXTINGUISHED. ACFT GROUNDED. REMOVED AND REPLACED THE LT SIDE WINDOW HEAT CONTROL UNIT IAW AMM 30-41-11, OPS CHECKED GOOD IAW AMM 30-41-11-400-801, PARAGRAPH G.