As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED WING ANTI-ICE DUCT MESSAGE IN FLIGHT WITH LT WING INDICATING RED. OCCURRED AT FL250 CLIMBING TO FL290. CLEARED AFTER FOLLOWING QRH TO CLOSE FOURTEENTH STAGE BLEED VALVES. WINGS HAD BEEN SWITCHED OFF PRIOR TO MESSAGE OCCURRING. CREW DIVERTED TO REMAIN CLEAR OF ICING CONDITIONS AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, R & R STANDBY OVERHEAT SWITCH AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.