What was found
R2 WINDOW HEAT OVERHEAT LIGHT ILLUMINATED AFTER PUSHBACK. GROUNDED - YES. PERFORMED WHCU BITE TEST NO FAULT NOTED B737-900 FIM 30-41 TASK 801, WINDOW HEAT SYSTEM OPS TEST NORMAL B737-900 AMM 30-41-00-710-801, WINDOW SENSOR & FILM RESISTANCE TESTS WITHIN LIMIT AMM 30-41-21 & B737-900 WDM 30-41-11-4, UNABLE TO DUPLICATE DISCREPANCY AND NO MX HISTORY 60 DAYS, REPLACED R2 WINDOW HEAT COIL CORD FOR PRECAUTION & OPS TEST NORMAL.