'03 Expy EB, the fan is stuck on high speed, it won't turn off. All the digital controls seem to work, I can change where the air blows from, the temp, etc., but I cannot shut the fan off or turn down the speed. Also, I can adjust the fan speed indicator, but even though it shows low speed, it's still on hi. Any help is appreciated.

 

I had this very same problem. You'll need to get 6L1Z-19E624-A from the Ford dealer and it's an easy swap out. Located in the passenger side footwell on the right side. Few bolts and it comes right out.

 

Here's the link to the other thread on this problem:
https://www.ford-trucks.com/forums/7...fan-speed.html

The Part number was slightly different for my '03 EB Expy

 

Here's the link to the other thread on this topic:
https://www.ford-trucks.com/forums/7...fan-speed.html

The part number for my 2003 EB Expy was slightly different.