Bosch Dishwasher code E09, water stone cold

[ahardy42]

Same question as Boschdishwasher above. Ours is a NEFF S515T80D2G, but with the side panel off it looks almost exactly the same. Thanks.

You need someone with a whole load more knowledge than me to answer that. I don't even know whether the similarity between NEF & Bosch is pure chance or because they're the same. If they are the same, well it was fiddly but it can be done, just needs persistence.

 

[cpk44]

Thanks for getting back to me - pretty sure they're the same - or very similar - internally, because they actually are the same/similar - same factory, different branding, and all that.

The heat pump arrives this week, so I'll give it a go at the weekend. I'm torn between trying your approach and somehow removing the water tank, or turning the thing on its side and going in from underneath.

 

[cpk44]

Just thought I'd feedback here for anyone with a NEFF S515T80D2G. The "going in from the side" approach does work for this model too. To move the tank out of the way, there's a couple of extra steps. You need to remove an electrical connector - a small white block which just pulls away from the dark red block it's attached too - I used a small flathead screwdriver to help prise them apart. Next, you need to unscrew the circular grey inlet (?) from the inside of the machine. This is very firm, and will require pliers of some sort. Once free, you can move the tank out of the way. There's no need to disconnect the black hose at the bottom - that's probably more trouble than it's worth. After this, the approach is the same as the descriptions and videos for NEFF and Bosch machines without the tank.

 

[cpk44]

Just thought I'd feedback here for anyone with a NEFF S515T80D2G. The "going in from the side" approach does work for this model too. To move the tank out of the way, there's a couple of extra steps. You need to remove an electrical connector - a small white block which just pulls away from the dark red block it's attached too - I used a small flathead screwdriver to help prise them apart. Next, you need to unscrew the circular grey inlet (?) from the inside of the machine. This is very firm, and will require pliers of some sort. Once free, you can move the tank out of the way. There's no need to disconnect the black hose at the bottom - that's probably more trouble than it's worth. After this, the approach is the same as the descriptions and videos for NEFF and Bosch machines without the tank.

 

[lili-]

I have a Bosch SMS63M42GB/B3 dishwasher which is about 8 years old and it's not heating up the water at all, and ends with the error code E09 in the display.

I've had a look at the youtube videos and it seems it could be either the printed circuit board which controls the heater, where the engineer said that after 8 to 10 years, the heat relay just burns out after years of running hot.

The heater relay:

Then there's the probability it's the water heater in the water pump:

The heater & water pump:

So I don't know which it could be, although there's the advice from espares.co.uk which looks useful but is for all makes, not just Bosch, so I'm wondering if it's worth following:

How to Diagnose Dishwasher Leaking and Heating Problems | eSpares

Leaking or heating problems with your dishwasher can have a number of causes. In this article, we're going to run you through identifying the potential reasons, as well as guiding you on the steps to take to fix them.

www.espares.co.uk

espares.co.uk want £85 for a new pump: https://www.espares.co.uk/product/es1773867/dishwasher-heat-pump-and-motor-assembly

I can get Bosch to come and try to fix it, but it will definitely cost £120 call-out minimum plus spare parts, and they've got no appointments for another 20 days!

Obviously in the meantime I'm seriously thinking about doing this myself but I don't want to spend the time and money to find out I diagnosed it wrong.

And I'll try to avoid washing up by hand by emptying a kettle full of boiling water into the machine while it's running.

This thread has some useful component-level testing, but for anyone arriving here just because the display says E09, I wouldn’t jump straight to ordering a heat pump.

E09/E20 identifies the heater/heat-pump fault area. The exact model, whether the dishwasher ever heats, and whether the code returns after one reset are useful observations before internal electrical testing.

I summarized the code meaning, model scope and safe stopping point here: https://www.errasift.com/bosch-dishwasher-e09-e20-error-code/