As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT SIDE WINDOW HEAT OVERHEAT. RAN QRH, LIGHT EXTINGUISHED THEN CAME BACK ON. GROUNDED - YES. UNLATCHED WHEN ACCOMPLISHED OPERATIONAL TEST OF THE WINDOW HEAT FOR LT SIDE WINDOW. TEMPERATURE WITHIN LIMITS. ACCOMPLISHED RESISTANCE TEST, PER B737-900 FIM 30-41 TASK 809. RESISTANCE VALUES WITHIN LIMITS. BITE TEST PASSED, GROUND VERIFICATION TEST IS GOOD.