Code No. B1021: Fan dial SW error


COMMENTS ON TROUBLE SYMPTOM
This code will be set when the air volume control dial position on the heater control panel or A/C control panel is detected as abnormal.

PROBABLE CAUSES

  • Malfunction of the heater control panel or A/C control panel

DIAGNOSIS

Check whether the diagnosis code is reset
Erase the diagnosis code. Then check whether the diagnosis code is reset.

Q. Is the diagnosis code set?
Replace the heater control panel or A/C control panel.
This diagnosis is complete.