As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW OVERHEAT. CYCLED POWER PER QRH OVERHEAT RE-OCCURED WITHIN 10 MIN. GROUNDED-YES. ACCOMPLISHED B737-900 FIM 30-41 TASK 801, NO FAULTS. HAS SENSOR IN BITE HISTORY R2 WINDOW SENSOR IS ALREADY IN SPARE POS. OPERATIONS TEST HEAT FOR 15 MIN, OPERATIONS NORMAL NO HISTORY 60 DAYS.