As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP ON, AT RECALL. CLEARS WITH MC RESET. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTROLLER BITE CHECK OF BOTH LEFT & RIGHT CONTROLLERS IAW AMM 21-60-00-700-806-002. FOUND "CABIN SENSOR " LIGHT RED ON BOTH CONTROLLERS FOR FLIGHT DECK. UPON VERIFY, GREEN LIGHT ILLUMINATED. PERFORMED BITE CHECKS AGAIN. NO FAULTS NOTED.