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Bosch 4002/13 FD 7905. Inlet valve bangs on/off several times during start of cycle. After filling, rest of cycle all OK. Worse at night when water pressure higher. Checked inlet filters on inlet pipe and on machine – clear. Removed/inspected inlet valve – ok. Reckon its not the valve but the sensors. Watched side chamber during start up: water hurtles around and seems to fill OK for a couple of mins. Then a few bubbles rise from the base and the inlet valve opens for a short time again. What’s going on?
Re: Bosch inlet valve banging
Hi
Full Enr number please
It sounds to me as if your water pressure is to high and causes water level switch to switch on and off try lowering water pressure to machine.
Mike
Re: Bosch inlet valve banging
Many thanks washman for lightning quick response.
ENR is SGS4002GB/13 other number 19904290216427320331. Water pressure day is 3.5bar, goes to 4.5 night but user instructions say 0.5-10bar.
No problems with valve noise till recently so something changed last few weeks. Should I try partly closing stopcock/ball valve to reduce pressure? There is already a red tapered filter fitted in the inlet hose (stopcock end). Is this a restrictor as well?.Re: Bosch inlet valve banging
Possibly a blocked sump hose I reckon.
Will then fill and bouce off overfill s/w.
:plug: pull plug before investigating
Re: Bosch inlet valve banging
Yes indeed, a blockage in the inlet to the sump is the likely problem and if you are the least bit unsure how to proceed, I recommend calling out a local engineer. Try our
Repairs@
to see if there’s is one in your area 😉Re: Bosch inlet valve banging
Thanks Guys – but before committing myself to a call out, I would like to have a closer looksee. If the hose is transparent I can get some feel for how bad.
Any hints please on access to inspect the sump ? Presume through the front kickplate area?
Re: Bosch inlet valve banging
Checked that hose and it was clear. Could it be a sticking level sensor? – maybe that plastic chamber with the microswitch – any suggestions?
Re: Bosch inlet valve banging
windy1 wrote:Checked that hose and it was clear.
If that hose is clear and the machine fills normally (the NORMAL being that as it fills the circulatiog pump operates, filling continues until the small white button operates the microswitch to turn off the inlet valve).
If all that happens OK? Then I venture to suggest that your water pressure is a little too high, needs the stop-cock turning down somewhat AND more importantly to check your copper pipe fixings to their source as they possibly not secured properly to create the annoying banging noises in the first place 💡
Re: Bosch inlet valve banging
Ive had gunged up metering unit and tank causing that banging aswell
Greg
Re: Bosch inlet valve banging
gegsy wrote:Ive had gunged up metering unit and tank causing that banging aswell
This model doesn’t have a metering tank though
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