As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT CONT CABIN ILLUMINATED DURING MASTER CAUTION RECALL. RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. TROUBLESHOT REF B737-900 FIM 21-62 TASK 832 REPLACED CONTROL CABIN TRIM AIR VALVE REF B737-900 AMM 21-61-21. ORIG SUB DATE: 1/4/2023