Having same problem, have done all in this thread but still no go. It is fair to say that a reed switch is either on or off, so would be fair to say, to test the reed switch you could just complete the circuit by running a cable between the two connectors. Again this wouldonly be a test and not a solution but I am assuming that the control unit is not expecting a certain amperage to be returned and that the reed switch does not return varying signals? I am very new to this, first dishwasher/first problem and it is driving me completely mad! An new reed switch is coming in at £65.00 so need to be sure it is the fault here. Please reply and help me with this!