2016 Multispace AC fan runs constantly

[cncjeff]

Hi All, I have see a few similar posts, but given the checks I have so far made, I think my problem is different. All of a sudden, the AC (heater) fan runs constantly on high. I thought it might have something to do with the heater resistor, but the fan continues to run even with the resistor disconnected. Moving the switch between 0-4 does nothing. When I disconnected the harness from the switch on the heater control, the fan did stop.

[Sol]

There may be a fault with the control unit behind the switches, there are different versions dependent on whether you have climate control or manual AC.