What was found
WINDOW OVERHEAT. RIGHT #2 SIDE WINDOW. GROUNDED - YES. PER B737-800 FIM 30-41 TASK 801 AND 806. WINDOW HEAT PWR RIGHT SIDE C/B WAS OPEN. RESET BREAKER. PERFORMED WHCU BITE. HISTORY OF BUS POWER FAULT. EXAMINED WINDOW TERMINALS AND BACK OF C/B. NO DEFECTS. R2 WINDOW RESISTANCE AND TEMP SENSOR CHECKS GOOD. PERFORMED WINDOW HEAT OPS TEST. R2 WINDOW TESTS GOOD PER B737-800 AMM 30-41-00. TEMPS WITHIN LIMITS. PREVIOUS SIMILAR WRITEUP ON 60037083 AND 60265108. REMOVED AND REPLACED WHCU FOR RIGHT SIDE PRECAUTIONARY IAW AMM 30-41-11. INSTALLATION TEST GOOD. TWO MIG-51A INSTALLED/ REMOVED.