As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R SIDE WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. RAN QR, LIGHT REMAINED ILLUMINATED. GROUNDED - YES. PERFORMED GVI OF R/H SIDE SLIDING WINDOW AND FOUND EVIDENCE OF WIRE ARCING IN UPPER AFT CORNER OF R/H SIDE SLIDING WINDOW. REMOVED AND REPLACED RH SLIDER WINDOW REF B737-800 AMM 56-12-11. OPS CHECK LEAK, CHECK GOOD.