Miele 24 in. G646SC Plus Free-Standing Dishwasher Logo

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Kenneth Harper Posted on Nov 28, 2017

Miele G 646 SC, Leaking.? My Miele G646SC is leaking, the red inlet/drain light is on and I suspect it may be one of the pump seals has perished. The machine is 11 yrs old and has never had a problem of any kind before. How do I gain access to the pumps to be able to change either the seals or if not, the complete pump ?

  • Kenneth Harper Apr 26, 2012

    Since posing the symptoms and the questions, I have found the source of the leak which turned out to be the hose from the base of the heating column / chamber and the first pump. The hose had come adrift from the input spigot of the pump and filled the drip tray which then allowed water to leak onto the floor.
    After refitting the hose ( can't understand how it came off in the first place ) I thoroughly dried the tray, turned the water supply on and switched on at the wall.
    After pressing the "On" button on the machine, the inlet /outlet light was a constant red. I turned it off by pressing and holding the start button until the light went out.
    About 10 to 15 seconds.
    I answered my other question regarding access to the pumps :-
    Unplugged machine from wall socket.
    Shut off water supply.
    Unhooked drain hose from under the sink.
    Pulled machine out from under the worktop.
    Removed the top panel, (access to 2 screws from underneath, with the door open) then slid the panel back a little to clear the 2 retainers at the back.
    Removed both side panels (each with 2 screws at top, 1 screw at front with door open).
    This allowed access to view the tray and at this stage managed to refit the hose.
    Regarding access to most of the components above the base tray, I suspect that for ease and safety, complete draining will be required then the machine could be carefully put on its back ( inlet and drain hoses to be positioned to avoid being trapped or squashed) to allow the bottom panel to be removed.

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Donald MacQuarrie

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  • Posted on Nov 28, 2017
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The dishwasher must be removed from the counter so you can gain access to the pump. I would check with a parts supply company first to see if the pump is still available, and the cost. It may be too expensive to repair a dishwasher that old.
Removing the dishwasher is not very hard. Turn off the electrical breaker. detach the DW from the counter. Pull out. disconnect the water supply and drain. disconnect power supply if required.

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joe_lishman

Joe Lishman

  • 192 Answers
  • Posted on Jan 17, 2010

SOURCE: Inlet/drain light flashes on miele dishwasher and

The outlet pump is triggered by the anti flood micro switch via the polystyreene float on the base of the washer. If any water for whatever reason (leaky pipe)is on the floor the machiene automatically switches to pump out mode and only works once the water and the cause is rectified

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David

  • 177 Answers
  • Posted on Mar 02, 2010

SOURCE: Have Miele G653 SCVi plus. We have inlet/drain flashing red light

Hi,

Sounds like something is caught in th drain pump as the unit has to drain first before anything else happens. Remove the filter and the non return valve which is under the clip in the sump of the unit. In the manual it shows you this. Make sure the drain pump is free of any foreign particles like broken glass. Then start the unit again so it goes to drain without the non return valve in place. This will then throw out any foreign particles as well.

or it could be the drain pump is activated all the time which is the noise you hear as there is a flood in the base of the unit which activates the float switch and constantly activates the drain pump until the water has gone. Isolate the unit at the power switch and remove the bottom panel under the door panel. Dry up the water as best possible with a towel. You will see the float at the front. Run the unit again and check for any water leaks. You may just have over sudded the unit with too much detergent. Only use 2 teaspoons of powder. To start with while testing don't use any detergent. Good luck

Testimonial: "Thank you for your excellent advice, the machine was flooded in the base when the panel was removed. "

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