As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW HEAT OVERHEAT LIGHT CAME ON. RAN QRH - AFTER 2 MINUTES WITH WINDOW OFF - TURNED IT BACK ON. 27 MINUTES LATER SAME OVERHEAT LIGHT ILLUMINATED. SWITCH WAS TURNED OFF FOR THE REMAINDER OF THE FLIGHT AND AIRSPEED RESTRICTIONS WERE REVIEWED. GROUNDED - YES. REMOVED AND REPLACED L-2 SLIDING WINDOW, LEAK AND OP'S CHECKS GOOD REF B737-800 AMM 56-12-11. WINDOW CODE IS H16. CONFIRMED TERMINAL TB5016 TAP IS ON #1. OP TEST IS GOOD PER AMM TASK 30-41-00-710-801. WHCU TEST GOOD PER AMM TASK 30-41-11-710-801.