As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE CABIN PRESSURE WARNING LIGHT ILLUMINATED AND CABIN PRESSURE BEGAN TO CLIMB. DESCENDED TO 10,000 FEET AND THE LIGHT EXTINGUISHED AND AIRCRAFT MAINTAINED NORMAL CABIN PRESSURE. AIRCRAFT DIVERTED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED BOTH WATER SEPARATOR BAGS. OPERATIONAL CHECK OF BOTH AIR CONDITIONING SYSTEMS WAS GOOD.