As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THROUGH APPROXIMATELY FL 250, L2 WINDOW OVERHEAT LIGHT ILLUMINATED QRH COMPLIED WITH OVERHEAT LIGHT REMAINS. GROUNDED - YES. T/S WINDOW HEAT SYSTEM. PERFORMED B737-800 FIM 30-41 TASK 801. ALL SYSTEMS OPS CHECK GOOD. OK FOR SERVICE.