95 300e desiel
 

aux fans run all the time motor is running or when key is in aux postion. problem started after i had new glow plugs installed.could something happen while new plugs were put in . will the constant running of fans burn out their motors .is it ok to keep driving how can i dis connect fans till i can get it back to my mec. he's away hunting for next two weeks

Temp sensor shorted or high-pressure switch (A/C). Might re-post this on diesel discussion for the location of said sensor.

AC on mine
 

I just bought a new set of aux. cooling fans for my 96. Same problem with constant run cooked the orig fans. My AC control unit is also NG, when I unplugged the AC control, the fan problem stopped. Now I need a new AC control panel.

aux fans constant running
 

thanks babymog i went out and moved the temp sensor wires and the fans stop running so it was a short in the wire thanks again

Great. The sensor is a fairly cheap part.