As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT CAPTAINS WINDOW OVERHEAT LIGHT ILLUMINATED. QRH PROCEDURE FOLLOWED MX AND DISPATCH NOTIFIED VIA ACARS AT 0117Z. PERFORMED BITE CK OF WHCU IAW FIM TASK 30-41 TASK 801 NO CURRENT FAULTS. FAULT HISTORY SHOWS LT SIDE WINDOW SENSOR FAULT. SWAPPED LT SIDE TEMP SENSORS TO SPARE IAW FIM TASK 30-41-00. PERFORMED BITE CHECK - BITE CHECKED OK IAW FIM TASK 30-41-00. GROUND VERIFICATION OK.