Dishwasher (Miele G638 plus) on the blink: gets to the pump-out part of the cycle and sits running the drain pump indefinitely (when I got to it this morning it was flashing the "drain/inlet" warning light). It fills and empties out, but it doesn't stop pumping when empty. I checked the obvious bits (drain hose, non-return valve etc) but nothing showed.
So now I've got the covers off and have extracted a thing that I'd expect to be a pressure switch,
has an image of something with the same part number.
My questions are:
- is it actually just a pressure switch (on/off), or have these things got more sophisticated since I last fiddled?
- would one expect to be able switch it by blowing into it? I've tried, and while something clearly moves inside, there's no click, and the resistance between pairs of terminals remains the same (infinite for most pin combinations, short circuit for one). This fits with my hypothesis that it's running the pump until the pressure switch says it's empty, and that never happens, but I can't see how to refute it.
- given that it appears to have adjusting screws (one is visible in the centre of the image at the above link, the other is in the tube at the very front of the picture), can I simply fit a replacement, or will I have to adjust it up to fill to the right level? I don't have a service manual, so I don't know the procedure.
For completeness: the numbers printed in black round the plastic part are 276974 E-01/09 T.NR.5380960 1200/700 and embossed in the plastic are "Type 790", "83067", "8.8169", "?", "T85", and the terminals are numbered 12, 14, 11 and the two gaps where terminals might be are both numbered 16. I'm sure that's more info than could possibly be of use!
On-line spare parts suppliers in the UK don't seem to do that exact part, but several offer
which looks very similar, but for a more recent model, so I'll probably have to phone Miele on Monday.
Thanks,