What was found
WINDSHIELD CONTROL CAUTION. WHEN SELECTED, THE WINDSHIELD HEAT FROM OFF POSITION THROUGH WARM UP AND NORMAL POSITION. RETURNED TO FIELD. LANDING UNEVENTFUL. DURING TROUBLESHOOTING, FOUND NORMAL TEMPERATURE SENSOR BETWEEN CONNECTOR TERMINALS B & C HIGH RESISTANCE AND SPARE SENSOR E & F OPEN, ON F/O WINDSHIELD. REPLACED THE RT WINDSHIELD IAW AMM 56-10-01-000-801, AND 56-10-01-400-801, OPS CHECKED GOOD. RETURNED TO SERVICE.