As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT 2089, PITOT HEAT 1 CAUTION LIGHT ILLUMINATED IN ICING CONDITIONS. COMPLIED WITH CHECKLIST. MAINTENANCE REMOVED AND REPLACED NR 1 PITOT HEAD. PERFORMED LEAK TEST OF NR 1 PITOT SYSTEM. LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.