As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED WING OVERHEAT WARNING MESSAGE IN FLIGHT WITH WING ANTI-ICE SELECTED IN STANDBY MODE. NORMAL MODE WAS ON DEFERRAL PER MEL. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED LEFT MODULATING AND SHUTOFF VALVE USING AIRCRAFT MAINTENANCE MANUALS. THIS ALSO CLEARED PREVIOUS DEFERRAL. AIRCRAFT RELEASED FOR SERVICE.