As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT FWD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED AT FL380 SWITCH PLACED IN OFF POSITION FOR 5 MINUTES. WHEN PLACED TO ON POSITION NORMAL OPS. GROUNDED - YES. ACCOMPLISHED WHCU BITE, NO CURRENT FAULTS. HISTORY SHOWED NUMEROUS REPEATS ON WINDOW HEAT SENSOR FAIL. REF FIM 30-41-00-810-801. PLACED WINDOW SENSOR SELECT SWITCH TO OTHER SENSOR POSITION, NO CURRENT FAULTS NOTED, BITE NORMAL.