As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD CABIN ZONE TEMP LIGHT ILLUMINATED WITH RECALL, EXTINGUISHED WHEN MASTER CAUTION RESET. ACFT GROUNDED. RESET WITH MASTER CAUTION. ACCOMPLISHED CABIN TEMP CONTROLLER BITE IAW FIM 21-62 TASK 801. FOUND THE FWD SENSOR FAULT LOGGED. FOUND ALL CABIN AND FLIGHT DECK SENSOR FILTERS BADLY CLOGGED. CLEANED THE FILTERS AND RESET THE FAULT, CABIN TEMP CONTROL OPS NORMAL.