Combines Yet Another Moisture Sensor Problem

[STATIC_84]

Here is couple of things to check. last year seen a bunch of YMIUs with water inside them. Pull the grey and black connector, if there is any moisture in the connectors I would bet money there is water in the YMIU. Also check the two connectors below and left of the cab air filter for moisture, this is more of a common problem. Clean with electric cleaner and air.

 

[Big_Al]

Well I had high hopes, but after doing what you suggested, it remains the same. Actually, yesterday it pretty much stayed at 53 all day. The service guy I talked to suggested recalibrating the moisture and all that did was bring it down to 47.