As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER LEVEL OFF AT FL330, R SIDE WINDOW OVERHEAT ANNUNCIATOR LIGHT ILLUMINATED. ALLOWED 5 MINUTES COOLING PER QRH, THEN LIGHT REILLUMINATED 4 MINUTES LATER. PROCEEDED WITH R SIDE WINDOW HEAT IN OFF POSITION FOR THE REMAINDER OF THE FLIGHT. GROUNDED - YES. REMOVED AND REPLACED R2 WINDOW B737-800 AMM 56-12-11-400-801.