As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO CONTROL CABIN TEMP IN AUTO MODE. AUTO MODE STILL DID NOT WORK AFTER RESETTING CABIN TEMP AUTO, L MAIN E4 CIRCUIT BREAKER AS PER E/A CHECKLIST. MANUAL MODE WORKS FINE. MX REPLACED CABIN ZONE TEMP SENSOR. OPS CHECK GOOD. ACFT RETURNED TO SERVICE.