As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU-PIT - FLT 1423 - ON CLIMB GOING THROUGH FL 100, PACK CABIN SUPPLY TEMP WENT TO 100F EVEN WITH TEMP SELECT FULL COLD. ONE PACK WAS ON MEL AS WELL AS APU BLEED AIR. AIRCRAFT DIVERTED TO GSO. NO FURTHER INCIDENTS. MAINTENANCE REPLACED LEFT BYPASS VALVE. (M)