Full 'make model (what it is)' in all question please.
Generic E4 Error fixes
The E4 error code relates to there is too much water via the inlet or a possible leak. You have acted correctly by checking the fitting and joints for leaks.Jun 16, 2021
Leak detector on bottom of machine has got wet Un plug machine and dry float on leak detector Or turn machine on its side allow water to drain off flood device Important make sure no power going to machine while doing this