Thanks to all who post the info on this site. With your help I was able to solve an issue with my water in fuel light that kept coming on. I drained the unit multiple times and the light would come back on after a few miles of driving. After reading about this issue on this site, I removed the sensor from the unit and sure enough, it was full of some type of debris. I cleaned it out and put it back in and that has fixed the problem. Thanks.


2003 Excursion 6.0 EB with Quad Seats and all the toys. 66,000 miles

 

if it gets corroded again you can buy that plate and sensor as a unit w/out the complete HFM, I think mine was only $60 or so.

 

I was suprised at how easy it was to remove the sensor. The stuff in between the probes was some kind of goop.