As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AT 34000 FT L SIDE WINDOW OVERHEAT LIGHT ILLUMINATED. TURNED WINDOW HEAT SWITCH OFF PER QRH PROC. AFTER 5 MINUTES TURNED L SIDE WINDOW HEAT SWITCH ON. CLIMBED TO 38000 FT OUTSIDE AIR -51C SAT, -24C TAT. AFTER 17 MINUTES L SIDE WINDOW OVERHEAT LIGHT ILLUMINATED AGAIN. GROUNDED - YES. REMOVED AND REPLACED LEFT SIDE NR 2 WINDOW PER AMM 56-12-11. WINDOW HEAT OPS TEST GOOD PER AMM 30-41-00 PER FIM 30-41 TASK 811 WHCU BIT TEST GOOD.