What was found
L1 WINDOW SHORTED OUT & WINDOW OVERHEAT LIGHT ILLUMINATED. AFTER COOL DOWN PERIOD RESET SWITCH. WINDOW OVERHEAT REMAINED ON UPPER LEFT CORNER HEATING ELEMENT FLASHED, SHOWED EVIDENCE OF A SHORT. GROUNDED - YES. VERIFIED L FWD WINDOW TAP IS ON CORRECT TERMINAL LUG (H13 ON LUG 1 TB 5010) PER B737-800 WDM 30-41-11-P6 SHT 1. REMOVED AND REPLACED L1 WINDOW THROUGH AMM 56-11-11 3(I) 6. NOTE: MODE CONTROL PANEL NOT DISCONNECTED. FINISHED INSTALL OF L1 WINDOW REF AMM 56-11-11-400-801 STEPS 3 (I)7 - 3 (J) PERFORMED WINDOW HEAT OPS TEST. OPS TEST GOOD. NO OTHER DEFECTS NOTED.