What was found
ON TAXI UPON RECALL " FWD ZONE TEMP" LIGHT ILLUMINATED AND CANCELS ON MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE CHECK. NR 1 CONTROLLER OPS NORMAL, NO FAULTS NOTED. NR 2 CONTROLLER HAD 1 FAULT (ZONE). CHECKED AND FOUND FWD CABIN TEMP SENSOR FILTER COMPLETELY CLOGGED. REMOVED FWD CABIN TEMP SENSOR ASSY FILTER, IAW 21-61-06. CLEANED FILTER ASSY, IAW 21-61-06-100-801. REINSTALLED FILTER ASSY, IAW AMM 21-61-06. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE CHECK ON NR 2 CONTROLLER, OPS NORMAL, NO FAULTS NOTED, IAW AMM 21-61-00-700-806-002.