What was found
ZONE TEMP ILLUMINATED ON RECALL MASTER CAUTION CONTROL CABIN ZONE TEMP. GROUNDED - YES. C/W FIM PROCEDURES. INITIAL EVALUATION, BITE TEST AND NOTED FLT DECK TRIM VALVE RED LIGHT ILLUMINATED. DURING BITE TEST RESET PROCEDURE GREEN GO LIGHT ON AFTER VERIFY TEST SWITCH PUSHED = FAULT RESET SUCCESSFUL. OPERATED R & L PACKS WITH NO FAULTS NOTED. NO FURTHER ACTION REQUIRED. REF B737-900 FIM 21-62 TASKS 842, 801, & 832, AND B737-900 AMM 21-00-00.