What was found
LEFT FWD WINDOW OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. FOUND LEFT FRONT WINDSHIELD SENSOR SWITCH IN SPARE POSITION PERFORMED WINDOW TEMP SENSOR RESISTANCE CHECK IAW B737-800 AMM 30-41-21-760-801 PRIMARY SENSOR CHECK GOOD , SPARE SENSOR CHECKED OPEN PLACED SENSOR SELECT SWITCH TO PRIMARY AND PERFORMED WINDOW HEAT CONTROL UNIT BITE PROCEDURE SYSTEM OPS CHECK GOOD IAW AMM 30-41-00-710-801 & B737-800 FIM 30-41 TASK 801.