Miele G977 inlet/Drain light flashing

[jhs1954]

Symptoms:

Program starts water fills washing goes on... then 7mins into the cycle the light comes on. everything stops

What I have done:

removed the base. No sump water, all dry inside. removed and cleaned all possible filters inside and the ball valve. Removed hoses blew through, no blockages. Refitted one end and blew through again. Checked for kinks etc, nothing, no loose connexions. turned the pump with finger, some resistance, but felt like the magnet, anyway it will drain fully at the start of the program.

refitted everything

Whats happening now: tried on a prewash cycle, each time the same, fills, then about 8 mins in washing normally then it stops, light flashes water in the bottom, undrained. If I set the dial to stop and restart the prewash it drains and refills and starts again, then cuts out after 6-8mins with the same light issue.

Any ideas whats wrong....

 

[zipper]

It is unlikely to be a drain pump issue.

Put it all back together & try this:
Close the door & switch off. Set the rotary selector switch to the 12 o'clock position. Press and hold the start button & switch on. Release the start button within 1sec then immediately press and release it twice. If the Inlet/Drain and Salt LEDs flash you have entered diagnostics correctly. If not repeat the above.

Once in diagnostics set the rotary selector switch to the 1 o'clock position. Press the start button. If the Start LED at the 1 o'clock position lights up, no fault is registered. If this is not the case, turn the rotary selector switch slowly clockwise until the Start LED does light up. Note the "o-clock" position of the selector at this point & post it here.

To quit diagnostics (without saving) set the rotary selector switch to the 12 o'clock position & switch off.

 

[jhs1954]

Thanks for helping!

did what you suggested.. with the button sequence then

start light flashes green at 1 o clock

didn' try anything else, i.e other clock positions

 

[zipper]

If you entered diagnostics correctly then the Inlet/Drain and Salt LEDs should flash. Did this happen before you moved the program selector & pressed the start button??? I suspect you may have a problem with the circulation pump or the pressostat attached to it.
i.e. the pump isn't creating enough pressure (because the impellor is damaged/clogged by garbage etc), or the pressostat isn't switching.

 

[jhs1954]

The inlet/ drain and salt flash red together.

Start light off

then at 1 o clock the start light flashes on and off (green light)

 

[jhs1954]

sorry with the flashing green start light the other lights are flashing as well (drain/inlet and salt)

 

[jhs1954]

ok have rechecked the pump blades ( the one that sits in the sump, you have to get rid of the ballbearing housing to see it)

blades all good , clean. resistance felt turning on every second blade, feels magnetic).

So is it likely to be the pressure sensor.

(Just as a footnote Miele wanted £72.00 for somone to come out to diagnose the problem. They wont allow you to talk to an engineer even to get a ball park idea of costs or possibilities!)

ps the machine was bought in 2007

 

[zipper]

No...that is the drain pump, it only empties the machine.
The circulation pump (the largest motor) does the washing.
If it can't build up pressure (or the pressostat doesn't switch) the machine will stop & show the error you have seen earlier.
Go back into diagnostics & turn the selector slowly CW until you reach a position where the start LED is permanently lit.
Also look for a sticker on the door lip & post the details on it.
Of course Miele won't let you speak to an engineer, they are protecting their interests & rightly so. Why should they help you for free.

 

[jhs1954]

I guess I haven't checked the circulation pump, how do I get to it?

on the other stuff...

no permanent green light at all

only flashing green at 1 an 2 oclock

3-11 oclock = no green start light at all.

plate shows

G977 plus

Type HG01
No:40 / 84972787

re my comments on the Miele 'advice charge'

I guess if have a blowing exhaust I would expect a dealer to give me an evaluation of the sort of costs I could face if I went ahead with the repair and used them....that's the way I see it, but I guess they don't.....

anyway aside from that thanks for your coninued help

regards

 

[zipper]

You can get to most components by lying the DW on its back & removing the baseplate.
However from what you describe it sounds a little contradictory. A start led at 1 o-clock = no error (F00). A start led at 2 o-clock = NTC open circuit (F01).
Give it one last try before doing anything else, but this time try pressing the start button in at each position when moving the selector clockwise & see what that pulls up (wee bit rusty on this model). If you get the same result I would assume your pcb may be defective, which is unusual but not unheard of. If you do get a solid led on anything past 1 o-clock post the position. Otherwise you may have to bite the bullet & get Miele out. Miele machines are complex & it would be an endless task trying to guide you through every single component test. The pressure control system is monitored by the pcb & checked at various intervals before & after heating starts. If there is no noticeable pressure build-up before heating occurs the machine will shut down & error out after ca: 10mins. I have come across several similar issues in the past & the majority boiled down to the circulation pump, not that it has to be so in your case. Often it turned out to be nothing more than the wash impellor clogged by bits of sticky labels etc.
Regarding your conversation with Miele...the person you spoke to regarding estimates etc is in all probably a knowledgeable coordinator. They know exactly which questions to ask & will inform you how much a diagnosis will cost etc...but they don't have a crystal ball. It is the engineer's job to accurately diagnose the problem, but if engineers used all their time giving free advice I think we'd be out of a job pretty quick.

 

[jhs1954]

will check this out tomorrow

cheers

 

[jhs1954]

The only indicators I see are flashing lights, I can see no error codes there is no digital display at all..

ok... with the 2 red lights flashing the results for the green start light when pressing start twice is:

12oclock nothing nothing
1oclock nothing green flashing
2oclock nothing green flashing
3oclock nothing nothing
4oclock to 10 oclock nothing then solid green on second press
11oclock nothing on both presses

thanks

 

[gasgas]

Zipper-
Thanks for your advice. I have the same problem, looks as if its a bit common. I did the diagnosis and no problem was registered. It is intermittent which is a bit of a .
I am a plumber by trade and have plumbed mine into the hot water supply, as that is softened and the cold is not. As I have an open vent hot water system the supply pressure is low. I keep the cyl stat at 50. Is the low pressure likely to be a problem? The Miele washing machine also takes its supply from the same HW supply and that works fine. It just occurs to me that if the dw is looking for a minimum water supply pressure and I happen to be running it at the same time as the wash machine that might be the problem. What do you reckon?

 

[leebetts]

i have been reading the posts on here i have been having the same problems i have followed the steps that Zipper has put on here and i am getting the light comes on at 4 o'clock what is the fault and can it be fixed by myself as i am very handy at fixing stuff