Hi guys.
I have a 2002-S40 with climate control unit problem.I went to a scrap yard and found 5 units from previous accident cars.All of them were working so I got one.it was working fine for aprox one month but now when I switch on the car with the climate control on 0 the ventilation is still running big time but the AC is off.if I switch the AC on it's cooling but just on one ventilation speed which is I guess the maximum one.So I went back to the scrap yard and tried the rest of the units but same response: with the ventilation switch on 0 the vent is still blowing like it's on 6.I don't think it's the climate control anymore I guess it's something else.
Can somebody advise me please?

 

Yes, it's not the unit. Chances are, the fan resistor is bad.

 

Thanks for answering so soon.
Question is: if I'll run a diagnostic,it will pop up as a fault?

 

I don't know. Do you have a CEL?

To be honest with you, I would have thought you would have tried something else after the 2nd or 3rd control unit.

Let me search for the part for you.

 

Heater Fan Motor Resistor S40 V40

There you go.

 

Hi again.I just replaced the fan resistor and it's all good now.thanks again.
I have another questiono you have any idea where is located the diagnostic plug?I was looking for it today,even I removed the compartment below the steering wheel and I just could't find it.I have a CEL and I intend to take a diagnostic.Can u help pls?

 

Found my diagnostic plug under my armrest in 2004 c70

 

Found it.it's in the left side of the central console