What was found
R SIDE WINDOW HEAT OVERHEAT ON IN DESCENT, RAN QRH, OVERHEAT LIGHT LITE ILLUMINATED AGAIN AFTER 5 MIN WAIT PER QRH. GROUNDED - YES. ACCOMPLISHED WHCU BITE REF B737-800 FIM 30-41 TASK 801. LRU SHOWS FAULT FOR RIGHT SIDE WINDOW BUS POWER. ACCOMPLISHED FIM 30-41 TASK 806 AND FAULT RESET. ACCOMPLISHED WINDOW HEAT SYSTEM OPERATIONAL TEST REF B737-800 AMM 30-41-00-710-801. OPS CK GOOD. GROUND VERIFICATION SUCCESSFUL.