Miele G1230 - F24

[Metallo]

Hi All,

Background

I had to replace the connector in the attached image, because it was fried due to some water pressure that came out of one of the water hoses.

I replaced the connectors with  some spare faston type connectors at home, so I temporary used them to connect the four wires, and  tested the dishwasher for three days, everything worked perfectly.

In the meantime, I received new faston type connectors from Amazon, I soldered them and insulated them properly.

I set the dishwasher up again and turned it on, but much to my surprise, after 18 seconds, I got the F24 error.

I removed the relay, saw that the contacts were dirty, cleaned them perfectly, but to no avail, F24 is still there.

So I removed the relay again, measured it with a tester, following this procedure, and the relay works perfectly.

I also accessed the panel in 'service mode' and reset the error, but it didn't help.

I did all the component tests, and they all worked as described in the documentation.

1. The relay contacts are perfect, just like the relay itself. It's extremely clean inside; I opened it up all the way to the last blade, and it looks brand new.

2. On the connector side, it's the same story – everything is okay.

3. I removed Plug ST5 from the heater relay and measured the resistance from connector 12 to 22: 284.5 kΩ.

4. Now, in the English manual, I read 10MΩ, so the 284.5kΩ I found would be significantly lower. Do you know what the correct unit of measure should be?

I removed the pressure switch and performed all the necessary measurements:

11 - 12 = 000.6

With pressure activated = OL

11 - 14 = OL

With pressure activated = 000.15

21 - 22 = 000.1

With pressure activated = 2

21 - 24 = 1.862

With pressure activated = 000.1

It seems unbelievable to me that after I replaced the 8 connectors, I got the F24 error, given that until 30 minutes earlier, everything was working fine.

It would be a hell of a coincidence.

 

The heater relay looks like new inside.

The heater pressure switch seems to work as expected.

 

But I know F24 is either the relay or the pressure switch... unless you have a better explanation.

 

Any help is appreciated.

 

Thank you

Alex