As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4352, DURING CLIMB-OUT AIRCRAFT FAILED TO PRESSURIZE IN THE AUTO MODE. THE AIRCRAFT WAS REMOVE FROM SERVICE. REMOVED AND REPLACED AUTO PRESSURIZATION DIGITAL CONTROLLER IAW EMB 145 AMM 21-31-01. OPS CHECK GOOD. ALSO PERFORMED MANUAL PRESSURIZATION CONTROL OPS CHECK IAW EMB 145 AMM 21-31-01. OPS CHECK GOOD. ALL PANELS VERIFIED AS SECURE. THE AIRCRAFT RETURN TO SERVICE.