As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2232: AFTER TAKEOFF, THE A/C DID NOT PRESSURIZE AND CNT FAULT LIGHT ILLUMINATED. AFTER A FEW SECONDS, FAULT LIGHT EXTINGUISHED AND A/C DID PRESSURIZE. AIRCRAFT RETURNED TO FIELD. MAINTENANCE REMOVED AND REPLACED FWD SAFETY VALVE, AFT OUTFLOW VALVE AND PRESSURE CONTROLLER. C/W FUNCTIONAL TEST OF THE PRESSURIZATION CONTROL IAW Q400 AMM 21-31-00, TR 21-061, TASK 21-30-00-720-801. OPS CHECKED GOOD IN MANUAL AND AUTO MODE. AIRCRAFT RETURNED TO SERVICE.