As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL AT CRUISE MASTER CAUTION ILLUMINATED WITH A CONTROLLER CABIN ZONE TEMP. FOLLOWED QRH, LIGHT WENT OUT WITH PUSH ON MASTER CAUTION. ACFT GROUNDED. REPLACED TEMP CONTROL VALVE FOR THE PRIMARY POSITION. BITE CONTROLLERS, NO FAULTS IAW AMM 21-61-00-810-801.