Bosch WAT28420GB/18 not spinning.

[Twoten]

An intermittent fault where the final spin fails.
The pump filter and sump hose are clear.
When testing the machine drains correctly and no E18 error confirming this.
Fill levels check OK.
Motor turns OK.
Customer suspected out of balance load so tried different loads, there is no E32 error.
No insulation fault.
I managed to get the machine not to spin when loaded on one occasion and noticed the “Too much foam detected” light was on but thought the machine would just run an additional rinse if this was the problem.

As I am unable to find anything else I wonder if it could be the eco valve in the sump.

Also, looking at the exploded diagram for this machine, to check/clear the sump valve I’m assuming I would need a repair kit, either 00621466 or 00621466 a rubber cap and hose clip @ £70/£80, how the hell do they come up with that price?

Any thoughts on this would be appreciated.

Thanks.

[electrofix]

those kits look like they just blank off a hole in the outer tub so they wont cause your problem

if it has got an ecoball somewhere then normally a good clean cures any sticking problems

assume from what you say you have had sump hose off the drum and checked for blockages

has customer changed soap powder recently ? was thinking if yes it may foam more

could try less powder

Dave

[Twoten]

electrofix wrote:those kits look like they just blank off a hole in the outer tub so they wont cause your problem

if it has got an ecoball somewhere then normally a good clean cures any sticking problems

assume from what you say you have had sump hose off the drum and checked for blockages

has customer changed soap powder recently ? was thinking if yes it may foam more

could try less powder

Dave

No obvious blockages here the sump hose fits.
I checked the amount of powder used which appears to be correct. I think this machine has a valve in the moulded sump rather than an ecoball in the sump hose. I assumed the kit as to blank off the drum after removing a plug to access the valve for clearing but could be wrong on this.
When I managed to replicate the fault the machine had drained OK but there was a bit of foam.
How does this machine sense if there’s excess foam?

[Author]

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