As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALB FLT 6021 THE CREW REPORTED PRESSURIZATION ERRATIC IN FLIGHT. COULD NOT CORRECT IN MANUAL MODE. THE AIRCRAFT DIVERTED INTO CLE AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE MANUAL PRESSURIZATION CONTROLLER. OPERATIONAL CHECKS WERE GOOD.