What was found
LEFT FWD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED, FOLLOWED QRH LIGHT WOULD NOT RESET. ACFT GROUNDED. REMOVED THE LEFT FRONT WHCU IAW AMM 30-41-11. ACCOMPLISHED FIM 30-41 TASK 812 E. (3), (5) AND F. (2) NO WIRING DEFECTS NOTED. ACCOMPLISHED AMM 30-41-21-760-801. WDM 30-41-11. AT D1044A PINS 13 TO 26 READS OPEN SPARE AND PRIMARY SENSOR, VERIFIED AT LT FRONT WINDOW SENSORS PINS A, B, C, D. REMOVED THE L1 WINDOW IAW AMM 56-11-11-000-801. ACCOMPLISHED THE L1 WINDOW VISUAL INSPECTION & WINDOW FRAME INSPECTION IAW AMM 56-11-11-400-821 STEPS F. (1) (3) & (4). INSTALLED L1 WINDOW WIPER IAW AMM 30-42-31-400-801. ACCOMPLISHED EFIC CONTROL PANEL TEST IAW AMM 31-62-12-400-801. ACCOMPLISHED AIR OUTLET VALVE INSTALLATION TEST IAW AMM 56-11-11-400-821. (3) I.