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 ON AND WOULD NOT GO OUT. ACFT GROUNDED. R & R FWD CAB ZONE TRIM AIR MODULATING VALVE IAW AMM 21-61-21-400-801. PERFORMED BITE CHECK IAW AMM 21-61-00-700-806-002. BITE CHECK GOOD. ACCOMPLISHED LEAK CHECK. NO LEAKS NOTED.