Jet Tech Mod F-18. What does error code E1 (in wash temp window) signify

[fixbear]

Where are you coming up with the error code, on one of the digital thermometers?   If so it is probably a temp probe.  Unfortunately they are sold as a sealed unit,  so replacement is required.

This is  what they look like;

https://www.partstown.com/jet-tech/jtd07-0623

 

  Otherwise this may help.