1992 Ford Aerostar Q&A
1992 Ford Aerostar Question: Where is the Idle control valve?
If the cooling fan is coming on right away, this may be indicating something other than the idle valve. If the reading from a temperature sensor, or load sensor is incorrect, it can turn the fan on. I recommend you have it diagnosed to prevent replacing parts that are good. - HughJ
I've run the devil out of my Aerostars over the years -- and I now still have my third one a 91...