What was found
UPON MASTER CAUTION "RECALL" CHECK, ON AFTER START FWD CAB ZONE TEMP LIGHT ILLUMINATED REF ACCOMPLISHED QRH & NOTIFIED MAINTENANCE CONTROL. LIGHT EXTINGUISHED ON MASTER CAUTION RESET. ACFT GROUNDED. REPLACED FWD CABIN TEMP SENSOR, OPS NORMAL REF MM 21-61-10-400-802. BITE TEST PASS REF MM 21-61-00-700-806-002. REPLACED AFT CABIN TEMPERATURE SENSOR REF AMM 21-61-10. OPS CHECKED GOOD REF AMM. 21-61-00. REPLACED FLIGHT DECK TEMP SENSOR REF MM 21-61-10-400-802. OPS CHECK NORMAL REF 21-61-00-700-806-002. GROUND VERIFICATION GOOD.