Whether I keep the fan on Auto, 0, 1, 2 ,3 ...., it is always blowing at full speed. The A\C will switch off if I move the **** to position 0 but the fan still blows at high speed. I am hoping it is a simple problem. Any advice.

Thanks in advance

 

It's a classic case of a bad Cabin Fan Motor Resistor. Simple fix, I want to think it runs around $100 for the part. Should take around 5 minutes.

The actual transistor on the blower resistor (an MJ802 or NTE181 last time I checked on my S40) is around $3 at online electronics vendors like Mouser.com If you're handy with a soldering iron, you could save yourselfsome moneyby just replacing the transistor yourself.

 

You can get the transistor at radio shack for $2.29:

http://www.radioshack.com/product/in...entPage=family

It is located near the cabin air filter. There is a connector to the right (outboard) of the cabin air filter that comes off and you can take the resistor out. It is a pain to get to the top screw becauseofthe metal cross bar. You can move the barif you undo the bolt near the passenger door. I discovered thisafter about 30 min of tryingto put the screw back in by feel.

 

Here you go, step by step:

http://s40concepts.net/forum/index.p...7f722c2d95f12f

 

Thank you guys. I really appreciate your advice!

 

Several links on this issue. I pulled my transistor out and will get one shortly. However, the Radio Shack item is only 15A while the OEM part is 30A.
MTE electronics makes a like item at 30A, MTE-181 is the part number.