As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD CABIN ZONE TEMP LIGHT ILLUMINATES ON RECALL. EXTINGUISHES ON RESET. ACFT GROUNDED. BITE CHECK OF NR 2 CONTROLLERS SHOWS FWD CABIN SENSOR FAULT AND PREVIOUS FAULT. UNABLE TO CONTROL TEMPERATURE FWD CABIN EVEN THOUGH MASTER CAUTION RESETS FAULT LIGHT. REPLACED OVERHEAD P-5 TEMPERATURE CONTROL MODULE. IAW TASK 21-61-15-400-801. NOW ABLE TO CONTROL FWD CABIN ZONE TEMP REF 21-61-00-700-801-002. FWD CONTROLLER BITE OK 21-61-00-700-800-002. PERFORMED CABIN TEMP CONTROL AND INDICATION OPS TEST GOOD, REF AMM 21-61-00.