As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R2 WINDOW OVERHEAT LIGHT ON IN CRUISE. LIGHT WENT OUT AFTER QRH. GROUNDED - YES. RERACKED L/H WINDOW HEAT CONTROL UNIT. T/S AND OPS / BITE CK NML PER B737-800 AMM 30-41-11. C/W CORD INSPECTION PER AMM 30-41-00-200-801 CKS NORMAL. OK FOR SERVICE. AFTER SUBSEQUENT OPS CK OF WINDOW HEAT SYS FOUND LEFT WINDOW HEAT CONTROLLER "WHCU - LRU" FAULT LITE STEADY ON - WOULD NOT RESET. REMOVED AND REPLACED LEFT WINDOW HEAT CONTROL UNIT AND OPS/BITE CK NML PER AMM 30-41-11.