As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FWD CAB ZONE TEMP LIGHT ILLUMINATED AFTER TAKEOFF. CONTROLLER SEEMS TO BE WORKING BUT RESET DID NOT EXTINGUISH THE LIGHT. LATER IN FLIGHT M/C RESET EXTINGUISHED LIGHT. ACFT GROUNDED. FOUND NR 2 CONTROLLER HAS ZONE TRIM VALVE FAULT LIGHT. ACCOMPLISHED BITE TEST ON BOTH CONTROLLERS, NR 1 PASSED AND NR 2 HAD SAME FAULT. THE FORWARD TRIM VALVE DIDN'T MOVED AT ALL DURING TEST, REF AMM 21-61-00-700-806-002. R & R FORWARD PASSENGER TRIM AIR VALVE, REF AMM 21-61-21-000-801 AND 21-61-21-400-801. OPS AND LEAK CHECK GOOD.