What was found
LEFT FORWARD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. GROUNDED - YES. PERFORMED B737-800 FIM 30-41 TASK 801, FOUND SENSOR FAULT. NO HELP ON RESET, SWITCHED TO ALT SENSOR, NO HELP. GVI OF L1 WINDOW SENSORS FOUND SOME CRACKING IN BETWEEN BOTH SENSORS . FOLLOWED FIM 30-41 TASK 812 FOR T/S. RAN WINDOW HEAT FOR 2 HOURS, OPS NORMAL REF AMM 30-41-00. ALSO ACCOMPLISHED WHCU BITE CHECK FOR LEFT HAND FORWARD WINDOW FOR 2 HOUR HEAT TEST. NO ACTIVE FAULTS NOTED REF FIM 30-41 TASK 801. REF AMM 56-11-00 CRACKS IN ACRYLIC WAFERS ARE ACCEPTABLE MANUFACTURING WITH NO OTHER FAULTS.