As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER STARTING THE ENGINES AFT CABIN ZONE TEMP LIGHT ILLUMINATED. DURING RECALL WHEN THE MASTER CAUTION WAS RESET, THE ZONE TEMP LIGHT EXTINGUISHED. QRH WAS ACCOMPLISHED AND MASTER CONTROL WAS NOTIFIED. ACFT GROUNDED. ZONE TEMP CONTROLLER 2 FAULTED BACKUP ZONE CABIN SENSOR. CLEARED FAULT, CLEANED AFT CABIN SENSOR. NO FAULT ON RECALL. OPS NORMAL REF MM 21-61-06.