Bosch S5N27B

[sheepinadress]

I have an ancient Bosch S5N27B that has been working faithfully for almost 20 years. It starts it’s cycle and fills initially then once the element starts to heat the water it drains and does not refill. is this the end of the road or it there a fix a reasonably competent amateur can perform.

Best wishes

Jon

[Martin]

Re: Bosch S5N27B

sheepinadress wrote:I have an ancient Bosch S5N27B

Jon, that is not the model no. It should start SMS????? so could you look again for a number like that please?

[sheepinadress]

Re: Bosch S5N27B

Many apologies, SMS4042GB/11

Thanks

Jon

[Martin]

Re: Bosch S5N27B

Most likely is that the anti-flood switch has activated and there’s water in the base tray. As a rule the black rubber sump hose gets blocked and the water level float chamber overfills out onto the base tray. Activating the flood switch which turns on the drain pump. So, very fixable I would say.:D

[sheepinadress]

Re: Bosch S5N27B

Just run it again. It fills the okay for the initial rinse/wash though there is not enough water to cover the element. then once the wash phase starts there is no water in the tank itself just a very hot and lonely element.

Jon

[Martin]

Re: Bosch S5N27B

OK, Firstly the water never covers the element. (The normal water level is just lapping the salt cap). The problem is most likely a sticking float micro switch, so the left hand side panel needs to come off to check that switch and the fill matrix.

[Author]

Posts