As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CABIN ZONE TEMP LIGHT COMES ON WHEN RECALLED GOES OUT WITH MASTER CAUTION RESET HARD FAULT ON ZONE TEMP CONTROLLER NR 1 FOR "SELECTOR FLT DECK" NEED TEMP SELECTOR 4 2160 9 4035. TRIED RESEATING CONNECTOR, NO HELP. VERIFIED DISCREPANCY & HARD FAULT ON BITE CK NR 1 CONTROLLER. REMOVED AND REPLACED TEMP CONTROL MODULE REF MM 21 61 15. REPAIR CONFIRMED FIXED.