37: Drain error. Check drain pump from blockage, or replace faulty drain pump

136: Motor control module or Rotor Position Sensor error

F1: Flood switch has been activated. This may have been caused by a leak, or a faulty flood switch (mains filter PCB on DD603 & DS603 models)

F2: Rotor Motor error. The motor may be jammed/seized/faulty, or the Rotor Position Sensor may be faulty

F4: Heater error. the dishwasher has not sensed an increase in water temperature. Heater plate or main control board may be faulty.

F9: Electronics error (Phase 5 and above). Can be caused by a number of things: faulty cdrying fan, heater plate,  control board