Cabin Fan Woking Only on Position 4

[jure]

Hi,

I have AC setup and my cabin blower is only working when switch is on maximum (position 4). El charge is going on all four position on the switch. Do I need to replace restrictor or just check fan connections and put some contact spray since it wasn't in use for long time?

Thanks

[AussieM20]

This is a common E30 Fault. Replace the fan resistor should resolve the issue. it is on the Fan Motor cover in the plennum chamber (Firewall).

Regards
Greg

[jure]

Thanks. I know that non AC box has restrictor on the left side and is accessed from the cabin but did not know that AC box restrictor is accessible from the engine bay. Are they same (AC and non AC) although part number are not same?

Thanks

[Mikey_Boy]

Another thing to look at is the heater blower itself - when I had the same problem, I found that the heater had pretty much seized and this in turn had cabbaged the resistor pack by overloading it - I ended up replacing both the the blower and resistor so check both!!

[Brianmoooore]

Aircon/pre facelift resistor is right below the fan motor, and is accessed through the engine bay panel. As Mikey_Boy says, failure is usually caused by a seizing fan motor, which can only be successfully sorted by removing it from the car and powering it up from a battery as you oil it.