As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW OVERHEAT CAUTION ILLUMINATED DURING CLIMB PASSING FL 310, IN FULL SUNLIGHT. QRH ACCOMPLISHED. ILLUMINATED 30 MINUTES LATER. ACFT GROUNDED. PERFORMED OPERATION CHECK OF R2 WINDOW HEAT. OPS CHECKED NORMAL. PERFORMED WHCU BITE CHECK IAW FIM 30-41 TASK 801. BITE CHECK PASSED. PERFORMED VISUAL CHECK OF R2 HARNESS AND PIGTAIL. NO DEFECTS NOTED. DUE TO HISTORY, CHECKED PAST FAULTS LOGGED ON WHCU. REMOVED AND REPLACED RT WINDOW R2 WINDOW HEAT CONTROL UNIT IAW AMM 30-41-11.