As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT SIDE WINDOW OVERHEAT ILLUMINATED. RAN QRH. DID NOT ILLUMINATE AGAIN. OVERHEAT OCCURRED DURING CLIMBOUT AROUND 18000 FT, TEMPERATURE ON THE GROUND WAS 34DEG C AT AIRPORT. ACFT GROUNDED. REMOVED AND REPLACED THE RT WINDOW HEAT CONTROL UNIT IAW AMM 30-41-11. OPS CHECKED GOOD. ALL TESTS PASSED.