What was found
RIGHT SIDE WINDOW HEAT "OVERHEAT" CAME ON. GROUNDED - YES. PERFORMED WINDOW HEAT CONTROL UNIT BITE CHECK ON RH WINDOW NO.2 (M320) REF B737-900 FIM 30-41 TASK 801 FOUND FAULT (P5-9 CONTROL POWER) WINDOW HEAT WORKS INTERMITTENT TURNS ON/OFF PER B737-900 FIM 30-41 TASK 813 WIRING CHECKS GOOD. REMOVED & REPLACED WINDOW/PITOT HEAT MODULE (P5-9). PITOT HEAT TESTS PASS, WINDOW HEAT TESTS PASS REF AMM 30-41-41/401. OPERATED R/H NO. 2 WINDOW HEAT SYSTEM. SYSTEM OPERATES NORMAL AND P5-9 PANEL FUNCTIONS AS NORMAL. REF AMM 30-41-00.