W210 AC High/Low Switch
 

Hello all. Does anyone know how to test the ac high/low switch? To be clear this is the switch on the receiver dryer with 3 spades. I think mine is bad as my fans are not coming on when the ac is on....but the fans do work when I put 12v directly to the fans. Thanks in advance.

You can easily see the actual value that sensor is sending to the a/c pushbutton.

Try searching for how to read those actual values or send me a e-mail & I will supply that info to you.