As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED DURING CRZ. FOLLOWED QRH PROCEDURE & LIGHT EXTINGUISHED, THEN REILLUMINATED. GROUNDED - YES. OPS CHECK PERFORMED IAW B737-9 AMM 30-41-00-710-801 AND AMM 30-41-11-710-801 FOUND GOOD AT THIS TIME. LEFT SIDE SLIDE WINDOW GOT HOT AND RELATED SWITCH STAYED ON FOR 30 MIN NO OVERHEAT LIGHT ILLUMINATED.