Ok so if you leave it is the drain pump just running all the time?
Also when you say you checked the overflow switch was this the anti flood switch in the base underneath the dishwasher?
Yes Dan, checked the anti flood, if I turn on as normal, thaen select a programme, close the door.....it starts to run,well something does but no water.
Checked water supply to hose..ok
thought it was drain/empty running so filled filters with jug...re started and that emptied away.
tried several times to start and select a wash cycle ...no water
Ok are you getting any flashing lights from it?
And the ploystrine float was down on the antiflood switch then?
the float is down, the only lights on are the salt light. the salt has been added
Ok if there isn't any lights on other then the salt light but the pump is running all the time then its either a faulty flood switch or the control board.
If you have a multimeter then check the microswitch out on the flood switch. Check its switching over then its actvated and deactivated.
If the microswitch tests ok then its looking like the control board in the door is faulty as its only them 2 that powers the pump and can keep it running all the time.
So take the other door panel off and remove the plastic control panel and remove the board. From there just check for any burn marks.
But if the microswitch tests ok then im afraid its looking like the control board is the fault here.