Hoover dishwasher hod7715 80 wiring to heating element ?

hi can anybody help with this please been out to it this morning ,customer has had somebody else out who has taken wires from heating element and not replaced them .Have the usual brown and blue but also a red from the base pressure stat ,my hand wants to put this red along side the brown but in the back of my mind i seem to think i have seen one in the past fitted along with the blue any ideas or wiring diagram would be grateful thanks kez