I have Hotpoint WDL540 G (UK) C washer/drier which is very ill. The only functions it will perform is to pump out, operate the door lock, and the filling solenoid. When filling, it does this in a sequence of short bursts, then nothing. I have done resistance checks on the motor, heater, and sensors, and all seem OK. I have tried running with pressure sensor pipe disconnected (it is not blocked), and with the sensor connector removed. In desperation, I have replaced the main control module, but without success. There are no fault indications on the lights on the front panel. I am an experienced electronics engineer, so I should have sorted this by now, but am at a loss to know what to do next. Could it be the front panel unit is the problem?