What was found
ON TAXI IN, R & R OVERHEAT LIGHT ILLUMINATED. TURNED WINDOW HEAT OFF FOR 5 MINUTES IAW QRH AND THEN BACK ON. OVERHEAT LIGHT R-ILLUMINATED. ACFT GROUNDED. RT SIDE WINDOW HEAT CONTROLLER SHOWS A SENSOR FAULT DURING BITE TEST. REPLACED RT SIDE WINDOW SENSOR FLEXIBLE CABLE. OVERHEAT LIGHT REMAINS OFF. BITE CK OF WHCU SHOWS NO FAULTS ANYMORE. WINDOW HEAT SYS, OPS TEST OK REF MM 30-41-00-710-801 ETOPS GROUND VERIFICATION TEST OK.