Question about Miele 24 in. G646SC Plus Free-Standing Dishwasher

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Inlet/drain light remains on

Have followed the intruction ooklet, turned the dial to stop turned the machine off and then on again. Checked the flow of water intake, is normal.Cleaned the filter and beneath that taken the non return valve out and washed out, no kink in the hose. I feel that it might be something to do with the inlet hose, after opening the casing on the filter it appears to be full a dark green molded colour (it maybe it is suppose to be like this). The pump sounds to let the water out of hte machine, so I don't think there os a blockage. If there are any ideas please let me know, otherwise will have to scrap it, which is a shame.

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I have the same problem on a Miele G647 SC Plus. It starts and completes the wash cycle, might skip a final rinse - not sure, but it drains the water. Pump then continues to run for extended period then inlet/outlet light comes on. The dishwasher never moves to the drying cycle.

I cleaned all filters, checked supply/drain hoses + the non return valve. All seemed servicable. But no real improvement in fault.

Any way I can fix this?

Posted on Aug 13, 2008

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My G647SC PLUS has had the same symptoms with several week intervals. Now finally solved. Unplug the machine. Take off the metal front plate at the bottom of the machine - first remove the plastic cover under the door near bottom, two size 2 Pozidrives, then you get at the steel cover, again two size 2 Pozidrives, a bit harder to get at, you may have to lower the door. After removing the screws, gently lift the cover from low edge and it will come off. If the well under the machinery is dry, check the float sensor which is the white round flat-bottomed device near the front by removing the plug cover, the plug itself and finally the float sensor itself. Open it by releasing the two catches and check that the microswitch is not permanently activated by the styrox floating device. In my case it was, probably the styrox had lost some of its form but I managed to reinstalled it in such a way that it released the switch. I checked that by lifting the styrox the microswitch activates. Re-installed and run the machine, works fine now.

If the well is wet, then you have a leak in the draining system and need to replace the gaskets and/or the pump itself.

Posted on Mar 03, 2010

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I have a G647 SC plus. Fantastic dishwasher. Very quiet. If you have an inlet/drain fault, the fault I had was a faulty Non return valve. You remove it when checking the impeller by taking out the bottom strainer, fliping the wire catch and lifting the non-return valve housing off.

If you can blow into the pipe easily, the valve is faulty. In my case the rubber boot had rotted. You can temporarily fix this by twisting the valve apart, getting the rubber boot out, and trimming away all the rubber (put the modified rubber back in) so that the metal ball seals on the bottom of the plastic housing instead. It makes a bit more noise, but it will get you out of trouble until get a new check valve delivered. Part number 5269111 for G647 SC. inlet/drain light remains on - 19b5168c-06e2-4eaa-b5c8-4cd44e1f6b16.png 8bd22d47-7004-4aca-a997-980a516ca883.png

Posted on Sep 14, 2014

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I had the same problem with a different model with a persistent inlet drain light flash and a continuous running pump.

Checked the pump in the bottom had blades and wasn't blocked or obstructed (on mine take out the bottom strainer, flip the catch and lift the non-return valve housing off). Checked the drains were clear by putting a hose in where the non-return valve outlet goes (teh hose was a good sealign fit - standard garden hose) and running a decent flow down the drain. It all worked, no flood or other nasty. Put the machine back together and put a few cups of water in and turned it on - it drained. OK the drain pump was working.

Checked the water supply had pressure and flow. Descaled the inlet filter in the feed head on the tap (soaked it in vinegar for a while then rinsed and blew it clear). Still the flashing light.

Turned off and disconnected the electricity supply. Opened the front bottom plate of the machine. There was water standing in the drip tray at the very bottom of the machine. Dried the tray with a handful of paper towels. Put it back together. it ran fine.

I conclude that I need to replace the pump seals.

good luck with yours. rupertvdP

Posted on Aug 11, 2009

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