As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED DURING WING ANTI-ICE. FOLLOWED COCKPIT OPERATING MANUAL PROCEDURES AND LIGHT REMAINED ILLUMINATED. AIRCRAFT DIVERTED TO CLE AND LANDED WITHOUT INCIDENT. REPLACED ICE PROTECTION PRESSURE REGULATOR VALVE, OPERATIONAL CHECK GOOD.