As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ANTI-ICE DUCT WARNING MESSAGE ILLUMINATED WITH THE ANTI-ICE SYNOPTIC PAGE INDICATING A LEFT WING FAULT. THE CREW FOLLOWED THE QRH AND MADE AN UNEVENTFUL LANDING. THE AIRCRAFT WAS FERRIED TO DAY. MAINTENANCE TROUBLESHOT THE SYSTEM AND FOUND NO DISCREPANCIES. PER BOMBARDIER TECHNICAL SERVICES RECOMMENDATION MAINTENANCE REMOVED AND REPLACED 21 THERMAL SWITCHES IN THE LEFT WING LEADING EDGE IAW CRJ200 AMM 36-21-07-000(400)-801. THE SYSTEM LEAK AND OPERATIONALLY CHECKED GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.