What was found
R2 WINDOW OVERHEAT LIGHT ON; WILL NOT RESET AFTER QRH CHECKLIST COMPLETE "ON" LIGHT, GREEN, IS EXTINGUISHED. ACFT GROUNDED. MEASURED RESISTANCE OF R2 WIDOW HEAT SENSOR, THIS WAS OPEN OR FAILED. SWAPPED WINDOW TO ALTERNATE SENSOR REF AMM 30-41-21-760-801, SENSOR CK'S GOOD. WINDOW HEAT OPS CK TEST, PASSED REF AMM30-41-00--710-801.