As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW IDENTIFIED WINDSCREEN OVERHEAT ANNUNCIATOR LIGHT ILLUMINATED INTERMITTENTLY DURING FLIGHT. MAINT REPLACED WINDSHIELD ANTI-ICE VALVE WITH NEW STYLE VALVE. LEAK AND OPS CHECK WERE SATISFACTORY. AFTER CONTACTING THE OEM, THEY CONFIRMED AN IMPROVED VALVE WAS AVAILABLE. THIS IS THE PRODUCT WE INSTALLED.