As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THROUGH FL 28,0 RH SIDE WINDOW OVERHEAT LIGHT ILLUMINATED. PERFORMED QRH CONTINUED WITH WINDOW HEAT OFF AS PER QRH. GROUNDED - YES. CHECKED RH SIDE WINDOW PERFORMED WHCU BITE CHECK REF B737-800 FIM 30-41 TASK 801 NO CURRENT FAULTS OPS CHECK GOOD. INTERMITTENT FAULT. FOUND WINDOW SENSOR FAULT (RH SIDE WINDOW) IN FAULT HISTORY.