As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FO SIDE WINDOW OVERHEAT ILLUMINATED AT CRUISE. RAN QRH, BUT UNABLE TO CORRECT THE WINDOW OVERHEAT. GROUNDED - YES. FOUND FO #2 WINDOW HEAT CORD DISCONNECTED. RECONNECTED WINDOW HEAT CORD IAW B737-900 AMM 56-12-11. PERFORMED WINDOW HEAT OPS CHECK IAW AMM 30-41-00 NO DEFECTS NOTED.