As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 6232 - AFTER TAKEOFF, CREW NOTED LT DUCT OVERTEMP LIGHT ILLUMINATED. CREW UNABLE TO CONTROL CABIN TEMP IN AUTO AND MANUAL MODES. A/C RETURNED TO BOS AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE DUAL TEMP CONTROL VALVE. A/C RETURNED TO SERVICE. (M)