What was found
AFTER DEPARTURE FROM GEG APPRX 3K. CREW NOTED A HIGH CABIN TEMP- NOTICED THE CABIN WAS NOT PRESSURIZING DUE TO NO BLEED FLOW- CHECKLIST WAS FOLLOWED. SWITCHED TO RAM AIR. BLEEDS WERE TURNED OFF AS WELL AS PACK SWITCHES TO OFF THEN PAC SWITCHES TO AUTO + BLEEDS BACK ON. BLEED FLOW BEGAN AND A/C PRESSURIZED. NO OTHER ISSUES WERE NOTED DURING EVENT. NO PAC OR CABIN DUCTS HOT. NO CAUTIONS WERE OBSERVED. FLIGHT WAS CONDUCTED NORMALLY TO SEA. REMOVED FROM SERVICE. FOUND ECS FAULT CODE 3004, PERFORMED Q400 FIM TASK 21-60-00-810-809 AS REQUESTED. NO ADDITIONAL DEFECTS NOTED. RETURNED TO Q400 FIM TASK 21-60-00-810-809 FOR ECS FAULT CODE 3004. AS DIRECTED R+R PACK FLOW CONTROL AND SHUTOFF VALVE IAW Q400 AMM TASK 21-52-01-000/400-801. PACK FLOW CONTROL AND SHUT OFF VALVE OPS TEST PASSED. PRESSURIZED AIRCRAFT FOR MAINTENANCE REF Q400 AMM TASK 21-00-00-863-801. PRESSURIZATION CHECKS GOOD. NO LOSS OR FLUCTUATIONS IN PRESSURIZATION NOTED. FAULT CODE 3004 DID NOT RETURN. AIRCRAFT RETURNED TO SERVICE.