As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T2459/01MAR - LEFT AIR CONDITIONING PACK TEMPERATURE HIGH INDICATION AND PNEUMATIC PRESSURE MAXED OUT. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE FOR EVALUATION. REPLACED TEMPERATURE SENSOR AND CONTROLLER. FOUND WIRE PULLED OUT OF CONNECTOR ON PRESSURE REGULATOR. REPAIRED CONNECTOR WIRE ON PRESSURE REGULATOR. SYSTEM GROUND CHECKED NORMAL OPERATION.