As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT, CONT CAB ZONE TEMP LIGHT DISPLAYED ON MASTER RECALL. RESET WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED FLT DECK TRIM AIR MODULATING VALVE REF B737-800 AMM 21-61-21. 1 MIG-51A INSTL AND REMOVED OPS AND LEAK CK GOOD. PERFORMED CABIN TEMP CONT. AND INDICATION OPERATIONAL TEST REF AMM 21-61-00. OPS CKS GOOD.