As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL ZONE TEMP ILLUMINATED RESETS WITH PUSH OF MASTER CAUTION. GROUNDED - YES. PERFORMED PACK TEMP CONTROL BITE PROCEDURE PER B737-800 FIM 21-62 TASK 801. FOUND TRIM VALVE RED LIGHT UNDER PREV FLT ON TEMP CONTROLLER. PRESSED VERIFY SWITCH ON CONTROLLER GREEN GO LIGHT ILLUMINATED INDICATING NO PRESENT FAULTS.