As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUR HOURS INTO FLT, LT SIDE WINDOW OVERHEAT LIGHT ILLUMINATED, TURNED OFF FOR 5 MIN AND THEN BACK ON IAW THE QHR. AT THIS TIME OVERHEAT LIGHT ON IAW THE QRH. AT THIS TIME OVERHEAT LIGHT REMAINS OFF. ACFT GROUNDED. CHECKED WINDOW AND SENSOR RESISTANCE IAW 30-41-21, BOTH CHECKED NORMAL. PERFORMED M322 INSTALL TEST REF STEP F 3041-11. SYS CKS NORMAL. PERFORMED LT SIDE WHC OPS TEST 30-41-11. CONTROLLER REPLACED PRECAUTIONARY. NO HISTORY. WD 30-41-11.