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 LIGHT CAME ON AT 1,000 FT ON APPROACH. AFFECTED SWITCH TURNED OFF. ACFT GROUNDED. PERFORMED BITE TEST IAW FIM 30-41, TASK 801. NO FAULTS FOUND. PERFORMED WINDOW HEAT SYSTEM OPS TEST IAW AMM 30-41-00-710-801, CHECKS GOOD. FOUND TO BE INTERMITTENT FAULT.