communication error.could be a loose connection from/to the display pcb.blue wiring loom going from main pcb at the side to the display gets a bad connection.usually on the display pcb end.disconnect and reconnect that loom tightening connections usually sorts issue.if it doesn't throw it away as repair cost can get expensive!!
ck
February 2014
I can answer this question...
what is an error code e91 on a zanussi jetstream 1400?