Mr.Lee

We are repairing a 2004 Lexus GS300 and after we replaced the evaporator core and re-charged the freon,upon re-assembly the vehicle climate control either goes full hot or full a/c with no in-between. Codes 11,21 and 24 coming up. Disconnected BCM and pulled fuses to clear codes manually to clear codes. Codes and same problem came back. Please advise!