What was found
FLT#8097, JFK-DEN. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) 'SHORTLY AFTER T/O, WE RECEIVED A AIR ENG 1 BLEED FAULT. LEVELS AT 8,000 RAN QRC ECAM & QRH PROCEDURES. NEEDED TO AVOID ICING CONDITIONS. WHICH WE WERE UNABLE TO THUS FORCING US TO RETURN TO JFK. PROCEDURES DID NOT RESET BLEED FAULT; REF TSM 36-11-00-810-803-A, FOUND ENG 1 FAN AIR VALVE CTL THERMOSTAT FILTER CLOGGED AND O-RING MISSING. REMOVED AND REPLACED THERMOSTAT AND O-RING IAW AMM 36-11-43. RAN ENG 1 AT IDLE IAW 71-00-00 AND OPS TEST OF THE BLEED 1 SYS IAW 36-00-00, ALL OPS CHECKS WERE NORMAL.