As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK DOING RECALL CHECK, GOT CONT CAB ZONE TEMP LIGHT. GROUNDED - YES. CLEARED CONT. CABIN TRIM VLV FAULT , ON NO 2 PAC ZONE TEMP CONTROLLER. ACCOMPLISHED BITE TEST PER B737-900 AMM 21-61-00. NO CURRENT FAULTS NOTED . THIS CLEARS MEL 21-21G AND C/N 25035491. PLACARD REMOVED SEAMC MARK NOTIFIED.