indesit wd12 problems !

[spotofbother]

trying to fix a indesit wd12 washer/dryer for a friend.
problem is when it comes to a draining cycle the selector knob starts spinning and the door lock light flashes 15 times.
this fault can be reset but re-occures again on drain cycle.i have checked filter.
can anyone help please

 

[scotsman]

Dryer element relay not working, check connections on pressure switch and module.