As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT SIDE WINDOW OVERHEAT DURING CLIMB AT FL200. QRH PROCEDURE RESET SYSTEM. GROUNDED - YES. PERFORMED B737-900 FIM 30-41 TASK 801, BITE TEST OF RIGHT SIDE WINDOW HEAT CONTROL UNITS. BITE TESTS PASS. OPS CHECK GOOD, NO FAULTS DETECTED.