As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT SIDE WINDOW HEAT "OVERHEAT" ON FINAL APPROACH. TRIED ONE 5 MIN RESET IN AIR AND DID NOT RESET. GROUNDED - YES. COULD NOT DUPLICATE, CKD TEMP SENSOR & HEAT FILM RESISTANCE AND TAP SETTING, ALL CKD NML. R/R WHCU PER B737-900 AMM 30-41-11. SYS OPS CKS NML PER SAME AND AMM 30-41-00. GROUND VERIFICATION SUCCESSFUL.