As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, LEFT AOA HEAT CAUTION LIGHT ILLUMINATED. COMPLIED WITH QRH ABNROMAL 1L5. NO CHANGE IN CAUTION LIGHT. PER DISPATCH/ MOC DIRECTION, RETURN TO KRDU. REMOVED AND REPLACED NR 1 AIR DATA SENSOR HEATER CONTROLLER IAW CL-65 AMM 30-31-15. OPS CHECK GOOD.