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Hi
D/W stopped filling or rather filled veeery very slowly. Happened fairly suddenly but poss been taking longer to fill for some time .
Water inlet valve solenoid seems to have no continuity on multimeter so burned out? Cleared black hose that goes from bottom of float valve chamber to er? Cleared water filter at front of inlet valve. Water supply OK.
Is it guaranteed to be the water valve as there’s no continuity? Is it poss that there’s gunge somewhere else that’s doing it? We live in a very hard water area and i’ve cleared gunge before but for diff. problem.
If a new solenoid valve needed where’s cheapest to get it- seems to be a non-standard part with some kind of feedback thingie with a second outlet? – as opposed to a straight valve you can get on e-bay.
Thanks for any helpRe: Bosch sms 4452GB/11 not filling
Replacement valve is p/no 091051 @ £38.31, plus the dreaded VAT. Email to spares@ukwhitegoods.co.uk for confirmed prices and ordering.
Do not be tempted to fit a cheap valve without the pressure shut-off – it is a safety feature.
Regards,
Penguin45.Re: Bosch sms 4452GB/11 not filling
I’ll take that as a ‘Yes, it’s the inlet valve’ then! OK thanks for that and safety advice.
CheersRe: Bosch sms 4452GB/11 not filling
Sorry – the diaphragm in the valve loses the will to live eventually and no longer moves and flexes as it should, therefore flow rate can be cut down drastically. Ultimately, the extended opening period causes the solenoid coil to overheat and fail, then you get no fill at all!
Assume you’ve checked the obvious – kinked hoses, inlet mesh filters, nasty plastic tap handles turning the water on fully…….
Regards,
Pengujin45.Re: Bosch sms 4452GB/11 not filling
Penguin
Thanks for that – more intellectually satisfying! Have checked the other things but presumably the ‘no continuity in the coil’ is the killer diagnostic or am I mistaken?
CheersRe: Bosch sms 4452GB/11 not filling
alban wrote:presumably the ‘no continuity in the coil’ is the killer diagnostic or am I mistaken?
No you’re not mistaken, no continuity = new valve required 😉
Re: Bosch sms 4452GB/11 not filling
this is the same model as i have SMS 4452GB/11 and it’s just developed the same or very similar problem.
very little water is getting into the machine, i’ve observed some coming in from the round vent up on the left hand side but none from the top. it amounts to nothing more than a trickle really.
it sounds to me like some kind of motor? is trying to kick in and presumeably pump/circulate water around the machine? there’s a kind of buzzing? and a slight jolting of the machine?
i haven’t observed the spray arms turning either, don’t know if that’s related of not?
the little water that is accumulating in the bottom is being pumped/drained away when the program gets to that point.
the water supply is ok to the machine and there are no leaks or kinks in the pipe.
is the inlet valve the only possible cause of this as the noise seems to not be coming from there but further back (back left) of machine??
any help much appreciated as i hate washing up LOL!! 😯
Re: Bosch sms 4452GB/11 not filling
Sounds more like a circulation motor problem. This is one of the old “3 fills” machines, so after the initial pump out, there should be three separate, consecutive fills, followed by circulation. The water should be touching or half-way up the side of the salt cap when filling is completed.
The circulation pump is a relay start one – the relay may be failing with age (can you hear a click?). If it’s not working, the motor will hum and not run.
Power off before investigating,
Penguin45.Re: Bosch sms 4452GB/11 not filling
thanks for your reply
is it old, i think at least 15 years!!!
i’ve now checked the inlet valve and it appears there is continuity.
i would say it possibly is doing 3 ‘fills’ but it doesn’t seem to amount to a great deal although there is a covering at the bottom of the machine (maybe up to the salt cap?). however there is no ‘circulating’ going on? should i be able to see water coming down from the top ‘inlet’ and the spray arms turning?
how can i check the relay?
thanks
Re: Bosch sms 4452GB/11 not filling
Solenoid coil should give approx 3.5kOhms when metered out of circuit.
If you think the water level is low, the transfer pipe from the fill matrix to the sump may well be obstructed – remove left hand side panel to see what is happening.
You can get to the motor by removing the right hand side panel – the relay plugs into the side. You can do a continuity test on the coil; to check whether the bolt is closing the contacts, turn the relay upside down to bring the bolt into the closed position.
Penguin45.
Re: Bosch sms 4452GB/11 not filling
Penguin45 wrote:Solenoid coil should give approx 3.5kOhms when metered out of circuit..
is that for the inlet valve? if so i got about 4.1 so i guess that’s right.
Penguin45 wrote:If you think the water level is low, the transfer pipe from the fill matrix to the sump may well be obstructed – remove left hand side panel to see what is happening…
this wouldn’t have any bearing on the non-circulating would it??
Re: Bosch sms 4452GB/11 not filling
Coil reading on inlet valve is acceptable.
Underfilling can cause insufficient water to be in the machine to be circulated to the top rotor……
Best bet is to take of the side panels, stand back and see what’s happening…….
Penguin45.
Re: Bosch sms 4452GB/11 not filling
ok i’ll try that……thanks
is it ok to just try it on programme 1 (pre rinse) because i don’t want to be heating the element without any water over it!!! (as has happened a couple of times since the problem started) 😕
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