Bosch SBV69U80EU/01 Not filling properly

[MaxwellD]

Hi,

The dishwashers heat exchanger/reservoir is not filling with water completely, only about halfway. The machine sporadically comes up with a water supply error (blinking tap LED).

I have checked the reed switch on the flow meter with a MM and it seems to be properly closing and opening when exposed to magnetic force. The waterwheel itself also seems to be properly rotating when exposed to magnetic force.

I suspect the control module will be faulty, but looking for second opinion.

[Gerry85]

Re: Bosch SBV69U80EU/01 Not filling properly

Max,

Assuming you have checked the obvious
-water supply
-mesh filter at end of fill hose
-kinked inlet hose ( hard to kink on the bosch il admit)
-waste hose not siphoning water

I would go with replacing that reed switch at the flow meter. Usually it will put up an E 14 error code if my memory serves me correctly.
The main pcb’s tend to be fairly reliable and I have never replaced one for a water inlet fault. But in saying that every day is a school day.

Another thing to check if your dishwasher has the plastic bottom, is that there is no water leaking into the base activating the anti-flood. ( this caught me out before). You will see evidance of leaking from where the plastic base meets the metal case.

Hope this helps u out.
G

[MaxwellD]

Re: Bosch SBV69U80EU/01 Not filling properly

Hey Gerry,

Yes I’ve checked the obvious. The anti-flood is not active.

Messing around with the reed/flow meter assembly while the machine operates throws an E16 (water inlet valve), but that is to be expected. No E14 has been stored or displayed.

The machine has since developed additional issues, preventing me from testing this issue further. The machine had began to display E10 error and has a broken heater (confirmed with MM).

I’ll have to replace the heater before I can tackle the water supply issue now 🙁
I’ll order a reed switch along with the heater since it’s inexpensive anyways.

Also wanted to confirm that the heater breaking is indeed a fluke. This heater heats the zeolite canister, and thus it should be completely unrelated to water supply issues, correct? Also the machine does “top up” when it senses the motor is running lean, so it’s not like it’s running dry half the time.

[Martin]

Re: Bosch SBV69U80EU/01 Not filling properly

MaxwellD wrote:Also wanted to confirm that the heater breaking is indeed a fluke. This heater heats the zeolite canister, and thus it should be completely unrelated to water supply issues, correct? Also the machine does “top up” when it senses the motor is running lean, so it’s not like it’s running dry half the time.

The zeolite relates to the drying cycle so it is unrelated to the fill issue. A new reed switch may well sort out that problem. Low water pressure can be an issue and you might want to check the water outlet valve at the bottom of the heat exchanger/fill matrix.

[MaxwellD]

Re: Bosch SBV69U80EU/01 Not filling properly

The machine also does not heat the water at all. Is it possible that the machine is simply skipping the heating all together because it’s detecting the faulty zeolite heater? If i understand correctly the zeolite heater only comes into play during drying and the heater inside the pump should be working to heat the water, however it does not. I’ve confirmed that the heater inside the pump is in working condition.

The fill valve is ok.

[Martin]

Re: Bosch SBV69U80EU/01 Not filling properly

MaxwellD wrote:The fill valve is ok.

We figured that as if it wasn’t then no water at all would enter the fill matrix. I was referring to the small solenoid valve at the bottom.

Circulation heat pump is a major source of problems. The heater very poorly designed. Though if you recon it is OK, without sufficient water it wouldn’t work anyway.

Collectively it is difficult to specify or pin point the problem here. It could be one fault or a combination
of failings. You just have to eliminate any possibility.

Start by replacing that reed switch then reset the programme and go from there.

The joys of DIY eh? 😡

[MaxwellD]

Re: Bosch SBV69U80EU/01 Not filling properly

Yes the valves are both fine. I’ve confirmed them with a basic ohms measurement, and i’ve also confirmed they are getting mains power. The problem is purely in the electronics, the reed, the wheel itself or the main module. I have also seen the dishwasher fill the heat exchanger completely during wash from time to time, so it seems as though it only occurs under certain circumstances.

I can easily replace the circulation heat-pump if need be as i have spares, however I haven’t seen any need thus far as it was working properly (except for the filling issue) before yesterday when it stopped heating all together. It’s possible the heater on the pump is also faulty, but it measures just fine. The heater for the zeolite measures infinite so it’s definitely faulty.

I’m going to do some more measurements on the heatpump tomorrow, see if it’s getting mains power during wash cycle.

The biggest problem here is that i’m unsure exactly how this machine is supposed to operate during various programs and so i’m not sure what to look for.

I’m going to order the reed and the zeolite heater, see what happens. If that doesn’t work i’m going to swap out the heatpump and powermodule. If it does not work after that i’m going to crush it with my forklift 😉

I’ll report my findings here.

[Martin]

Re: Bosch SBV69U80EU/01 Not filling properly

MaxwellD wrote:If it does not work after that i’m going to crush it with my forklift 😉

I’ll report my findings here.

If the worst case scenario involves your forklift then do please post the video. :tup:

[MaxwellD]

Re: Bosch SBV69U80EU/01 Not filling properly

So it’s been a while, been too busy with work to mess around with the dishwasher, but had some time over the weekend courtesy of bad weather.

So i managed to get the machine up and running again… sort of. The issues it had seem to be resolved by replacing the reed and heater. However now it’s decided to sprung a leak triggering the flood switch. It will probably be a dubious and lengthy process of tracking down the leak as it seems… forklift is looking more and more reasonable right now ;-).

On a side-note; I’ve had a look at the broken heater and it seems the heating filament itself is fine, however a small component which was across the neutral feed and the heating filament seems to have failed. I suspect this might be a PTC, but there are no markings so i’m left guessing. Maybe someone here knows what this might be?

[MaxwellD]

Re: Bosch SBV69U80EU/01 Not filling properly

I’ve since learned that this is apparently a microfuse. Since i’ve already ordered the new heater and installing a new microfuse is a very delicate matter I’ve decided to bin it for now.

Meanwhile the dishwasher is working fine having replaced the sump gasket, as it was leaking (jeez this thing had a lot of issues!).

Thanks for the help all!

[Author]

Posts