What was found
AIRCRAFT DID NOT PRESSURIZE CLIMBING OUT OF PSC. A FEW MINUTES LATER FA REPORTED MAIN CABIN DOOR WAS NOT SEALING AND VERY LOUD. ON FINAL, FA SAID THAT DOOR DID APPEAR TO SEAL UP. REMOVED FROM SERVICE. FOUND EXCESS MOISTURE AROUND PAX DOOR SEAL. CLEANED PAX DOOR SEAL AND PRESSURIZED. CABIN PRESSURIZED NORMALLY. DURING DEPRESSURIZATION, FAULT LIGHT ILLUMINATEED ON CP PANEL. PRESSURIZED AGAIN AND SAME THING HAPPENED. CDS SHOWED CP CONTROLLER FAIL. R&R CP CONTROLLER, REF AMM 21-31-06-000/400-801. OPS TEST GOOD. AIRCRAFT CABIN PRESSURIZED/DEPRESSURIZED NORMALLY DURING BOTH ATTEMPTS, REF AMM 21-00-000-863-801, 21-00-00-863-802. RETURNED TO SERVICE.