As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT WINDOW HEAT "OVERHEAT" ILLUMINATED DURING DESCENT. QRH DID NOT CLEAR THE OVERHEAT. GROUNDED - YES. COMPLETED STEPS (F)6 AND 7 OF B737-900 AMM TASK 56-12-11-400-801. VERIFIED CORRECT TERMINAL BOARD TAP PER B737-900 WDM 30-41-11. REMOVED AND REPLACED R2 WINDOW REF AMM 56-12-11. OPS CHECK LEAK CHECK GOOD .