As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN RECALL IS PUSHED CONTROL CABIN, ZONE TEMP, LIGHT ILLUMINATES. LIGHT EXTINGUISHES WHEN MASTER CAUTION LIGHT IS PUSHED. TEMPERATURE IS ABLE TO BE CONTROLLED WITH TEMP SELECTOR. ACFT GROUNDED. PERFORMED BITE TEST ON BOTH NR 1 AND NR 2 TEMP ZONE CONTROLLERS, FOUND RED FLIGHT DECK TRIM VALVE LIGHTS ON BOTH CONTROLLERS. PERFORMED ZONE TEMP ADJUSTMENT TEST IAW AMM 21-61-00. SYSTEM OPS CHECKED GOOD ON BOTH ZONE TEMP CONTROLLERS.