As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CABIN UNCONTROLLABLE DRIVES FULL COLD NO MATTER WHAT TEMPERATURE IS SELECTED TO. GROUNDED - YES. PERFORMED BITE CK OF BOTH TEMP CONTROLLERS WITH NO FAULTS LOGGED. RAN BOTH PACKS AND CONT CABIN TEMP CYCLES NORMALLY IN AUTO AND MANUAL MODE. CONSULTED WITH TECH SERVICES AND REPLACED LT. PACK TEMP CONTROL VALVE PRECAUTIONARY. REACCOMPLISHED BITE CK AND RAN PACKS. SYSYTEM OPS NORMAL REF MM 21-51-00.