Help dishwasher leaking from inside

[happyhero]

Hi I have a Miele dishwasher and the float switch in the base activated due to a leak. Its model G 656 SC PLUS. I took the right hand side off I have found the cause, I think.

There is this big tank on the right hand side with a solenoid on it half way up. Looking online at the guts of this machine there is a tank called the Water Intake mixer on the right side and its leaking like hell from around the solenoid (Water Control Valve, Y5) at the beginning of a run cycle. This solenoid is half way up the side of the machine.

I took the solenoid off and you are then left with this plastic probe looking part that twists and comes off. I have taken it off and there is a big black rubber o ring which looks ok but is that the cause, if so what do I do?

Can I just put vaseline on it or something else or do I need to replace the probe part or the rubber or what?

It also has another rubber small part, which looks a bit scaled, could it be that? Can I get these individual parts or are they supplied with the tank part?

I dont think it will be easy to get another o ring the same size or are o rings made in standard sizes and so easy to match?

Help please

 

[assuhors]

The O ring is the cause but doesn't come without the solenoid at silly Miele prices. If you dry and clean the O ring refit it with a small amount of silicone sealant it should stop it leaking. Reassemble with the silicone wet leave for twenty four hours and test.

 

[dishman]

I had a similar issue with my Bosch recently,

The o-rings for the water tank were not sealing correctly and dripping. This slowly filled up the bottom tray and tripped the anti-leak float. Even after a clean, and numerous attempts to re-seat it, one always dripped.

Rather then use silicone sealant, which seems to be a rather messy and permanent solution (a pain to remove). I used teflon thread tape.

I assumed the o-ring was leaking due to wear. So all I had to do was increase the thickness of the O-ring. The teflon tape is perfect for this as it is flexible. It clings to and wraps around the o-ring.

The telflon tape only costs about 50p. I tore a piece off, kept it flat and rolled the o-ring along it's length ensuring it took up the tape as I rolled it. The teflon stuck to the o-ring perfectly as I rolled it along it's length. Keep it fairly tight, I did about 2 and a half rotations.

For the centre of the 0-ring I put teflon tape onto the part that slots down the middle (so not the o-ring itself) to ensure a tight seal.

Much cleaner and easier than silicone sealant in my opinion.

I did attempt it with plumbers paste initially, which is like putty but it did not work as well. The teflon tape worked perfectly.

 

[Nyoni]

I dont think it will be easy to get another o ring the same size or are o rings made in standard sizes and so easy to match?

The O ring is the cause but doesn't come without the solenoid at silly Miele prices.

I don't know what size the o-ring is, but if you ring the manufacturer of your machine and ask them for a parts diagram they will likely email it to you (Miele are on 0330 160 6600 and were happy to email it to me). That will give you the part number for the solenoid and then googling for "o-ring" and the part number has worked for me to find a potential replacement o-ring, if silicone or teflon doesn't work. So to fit the solenoid on my Miele G1222 machine, being their part no 6189170, I have found this one on eBay from seller roale7864_2f5ef5w7v for £7 or so including standard postage (quotes 7-10 days).

I had tried plumbers grease but without success before seeing this thread. If teflon and/or silicone don't work I will order a new o-ring from this eBay seller. Meanwhile many thanks for these suggestions.

 

[dishman]

@Nyoni - The teflon tape does work. Plumbers grease is pretty messy.

I repaired another dishwasher using this method last week.

Take the o rings out. Cleanand dry them (don't use washing up liquid).

First, fold the ptfe /teflon tape around the prongs that slot into the middle of the o-rings.

Then, wrap the 0 rings in a few turns of the tape. You should find the tape clings to the oring. It's like wrapping it in a bit of pastry. I would tear a length of the tape first, ensuring it does not fold up onitself.

Then, and this is the key bit. But the o-rings into the slots and push them to the bottom position.

Do not slot them onto the prongs. The Orings should be at the very bottom of where they sit. Then, slot the matrix back in.