Miele 24 in. Novotronic G851SC Plus Built-In Dishwasher
Problem for Miele 24 in. Novotronic G851SC Plus Built-In Dishwasher

Miele G851 SC intake/drain light flashing




By dadcar on Aug 20, 2007

" "
We have a Miele G851 SC (dishwasher) that has been used maybe 10 times since new in the past three years. Usually it is just an expensive dish rack for drying. But the last time we tried using it (this weekend) it fills with water, sits for 10 minutes or so, and the intake/drain light flashes in perpetuity. There is adequate pressure, the intake screen has been cleaned (it wasn't dirty), and the drain screen has been cleaned (also not very dirty). I removed the bottom cover and there isn't any water/moisture in the bottom pan (so it's not the "waterproof system" float). It is filling adequately and it is draining quickly and properly. Nevertheless, I tried pouring in an extra half-gallon of water after it started filling hypothesizing that perhaps the fill valve was shutting off too soon and the water level sensor, if there is one, thought there wasn't enough water. It exhibits the same behavior during all cycles.

I noticed that as it is sitting after it has filled and the water has shut off there is a soft click accompanied by a soft humming coming from the the control panel. It is on for 15 seconds, then off for 15 seconds. On then off. On off. Then the intake/drain light comes on and flashes forever.

Any suggestions for what to do next besides a scheduling a costly service call?
Comments:

Aug 29, 2007

- Hello Crytech,

It was just as you said, and now working fine. Two things: I laid the dishwasher on its side instead of back because the hoses were coming out of the back and I didn't want to stress them, and it wasn't necessary to disconnect the motor from the hoses or wiring. To remove the four screws jolding the motor to the pump body, it looked like the entire mechanical assembly would have to be removed from the tub because two of the screws weren't accessible. After removong the one screw from the back of the motor, I could pull it out just enough to gain access to the back of the motor, then I pushed gently on the cooling fins with a screwdriver. I could feel that the rubber seal has bound to the motor shaft, but it freed itself with very little pressure. The motor must not have very much starting torque.

Thanks a lot for your help!

Same Problem

Mar 28, 2009

-   I Have the same problem on the G 851 sc. The quickie temporary solution is to turn it off, switch to the rinse & hold mode and let that drain the excess dishwasher water for a minute or so before it starts to rinse. Then you can turn it off again & restart the DW if needed. -   Guest

Feb 01, 2009

-   Miele GS851 Drain light on and not draining. Turn off power form circuit breaker. Remove all dirty dishes. Take out shelf and rack. Take out stianless steel filter. Remove the drain pipe that have a metal wire ( Pull straight up and till out - It is very hard to pull out but it does pull out ) Place a lot of towel on the floor ( it will be a lot of water ) Till the dishwasher at the side. Remove the four philip screws from the four corners. Remove the motor from the back with a HEX screw on the back of the panel. Tilt the motor out. Spread with WD40 inside the rim of the fin blade. Give the fin blade couple tens of turns until it is free up. Reverse all the procedure. -   kitchenbasic

Feb 10, 2008

-   We are having a similar problem. The water is not draining out of our Meile 851. The intake/drain light comes on and the dishwasher stops. We have done all the things suggested in the manual. There are no kinks in the drain hose, we have cleaned the filters and the drain pump and the non-return valve. None were dirty or clogged as this appliance is in a vacation and gets used very little. The dishwasher drain hose is connected to our snikerator in sink disposal and that is working and draining fine. Any thoughts?-   Guest

Best Solution

posted on Aug 20, 2007
Very Helpful)

Crytech

Rank: Wiz 
Rating: 82%, 77 votes
Hi Dadcar,

Your main wash pump has seized (or stuck). Disconnect machine from power & water, Tip machine on its back. Remove screws that hold the bottom tray on. Remove hoses to main motor, remove electrical connections & remove motor (one screw that holds motor is actually on the outside back of the machine(you will see what I mean). Try to rotate (unstick) the motor (this can sometimes be done by spraying a bit of WD40 and trying to rotate the impellor with a pencil (careful not to break any of the fins on the impellor. If you cannot rotate it, then a new motor will be required. Replace back in machine in reverse to removal.

Good luck...I hope the motor turns for you.

PS Whilst you haven't used the machine very much, this in itself is a problem and can cause motors & pumps to stick, and seals to perrsh. Try to use the machine at least once a month.

Kind regards
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Solution #2

posted on Nov 25, 2007
Helpful)

captainchaos

Rank: Apprentice 
Rating: 85%, 1 votes
Crytech's approach also works for same problem on Miele G640 series. Like dadcar I followed the troubleshooting steps described in the manual to no avail. They were all to do with water inlet/outlet issues, and instinct said this wasn't the root cause. So it proved.

I tackled our machine as outlined, but noting the modifications offered in dadcar's reply. Couldn't really get access to the impellor, but found there was a vent between it & the motor itself. Through this I was able to reach the shaft with a small screwdriver & gently get it to turn.

On reassembly & test, I thought at first that the problem would reoccur. Just as I was about to curse myself for having forgotten to lubricate with WD40, there was an audible clunk & the motor kicked in. Hooray! An expensive service saved. Many thanks to you both.

P.S. My experience supports dadcar's observation of a weak starting torque.
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Solution #3

posted on Oct 12, 2007
Helpful)

FlashGordon1

Rank: Apprentice 
Rating: 85%, 1 votes

I had a similar problem with the "Intake/Drain" indicator on. Expect my system was draining but no water was comming in.

I called a Service department and they told me Miele will help me over the phone. They did. They had me check the Code by Hitting a few buttons on my g851 sc. And told me that I would have to open the bottom up and look for a loose wire or something disconnected. It opened up very easily and within a few minutes I could see a broken hose,which caused a leak which activated the watersafe float. I replace the hose and it is working Perfectly as normal.


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Solution #4

posted on Jan 01, 2009
Very Helpful)

NYCFIXER

Rank: Apprentice 
Rating: 100%, 1 votes
I have the Miele G832SC Touchtronic. I had tyhe same problem with water at the bottom of the dishwasher the the intake/drain valve was lit. I cleaned all of the filters to no avail. I went back to the user guide under maitenance/ Cleaning Drainpump and Non return Valve. The value under the bottom blade has a medal clip to the drain pump. I almost backed out becasue the clip was difficult to snap over and that is all I need is to mess things up more. I got the clip open, took out the part stated in the manual, rinsed it under the sink and a big piece of broken glass fell out. I put everything back and at first the dishwasher still showed the blinking Intake/Drain. I turned the dishwasher on and off a couple of times and finally the light went away and I had that wonderful sound of a machine washing the dishes instead of me!

I am also a girl by the way guys!
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Solution #5

posted on Dec 06, 2007
Not Rated)

Mohammad100

Rank: Apprentice 
Rating: 0%, 0 votes
Hi all,
Had the same problem. Took the motor out as described by other, and then the pump. I found many derbies inside the pump which I removed. I also used non-petroleum lubricant ( I believe it is of silicon type which I had purchased before from a plumbing supplier) and lubricated the shaft and all surfaces that rotate and are in contact with each other. I could feel the whole assembly became much smoother to rotate. It is working fine now. I thank you all for your useful info. I had also tried the trouble shooting section in the manual to no avail.
Enjoy your machines....

Comments:

Dec 06, 2007

- Hi all,
Had the same problem. Took the motor out and then the pump as described by others. I found many derbies inside the pump which I removed. I also used non-petroleum lubricant ( I believe it is of silicon type which I had purchased before from a plumbing supplier) and lubricated the shaft and all surfaces that rotate and are in contact with each other. I could feel the whole assembly became much smoother to rotate. It is working fine now. I thank you all for the useful information.
Enjoy your machines....
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