As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START MASTER CAUTION RECALL AIRCOND WITH ZONE TEMP LIGHT ILLUMINATED. ACFT GROUNDED. IAW AMM 21-61-10 CLEANED THE CABIN TEMP SENSORS AND FILTERS PERFORMED BITE OF BOTH CONTROLLERS (ZONE TEMP) PERFORMED ENG RUN OPERATED BOTH PACKS GROUND VERIFICATION OF ZONE TEMP CONTROL SYSTEM, SYSTEM OPS NORMAL.