As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA- DEICE CAUTION LIGHT ON DURING DESCENT. EMERGENCY PROCEDURES COMPLIED WITH, NOTED NORMAL DEICE PRESSURE ON BOTH SIDES AND ALL LIGHTS FOR DEICE BOOTS ON ICE PROTECTION PANEL ILLUMINATED. GROUND RAN AIRCRAFT WITH DEICE PRESSURE NORMAL IN FAST/SLOW OR MANUAL. COULD NOT DUPLICATE. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.