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As the subject – this machine has been having trouble draining for a little while, giving E20. It was E20’ing intermittently for a bit, and now will not drain at all.
Checked the filters, a few times there has been stuff in there, not too much though. Ended up taking off the black connector pipe underneath to begin with, found a big chunk of plastic(!), getting rid of that seemed to help for a time.
I’ve taken off the drain hose and blown through it, and that seems to be basically clear.
I’ve now taken off the drain impeller, and it seems kind of OK as well. The multimeter registers 180 ohms across the terminals which sounds about right, and although it feels a bit stiff to turn even with the magnet off, it doesn’t feel broken.
I’m planning on replacing it anyway since a spare seems to be about £20, but I’m kind of running out of ideas. Previously when it was trying to drain and failing you could at least hear a hum; that seems to have gone away.
I’m guessing if it’s none of the parts I’ve checked already then it’s probably the PCB that has gone. Am I missing anything, is there anything else to look at? 🙁
Re: Zanussi ZWD1471S refuses to drain – E20 error
If you’ve been trying it with the pump humming then before replacing the pump i’d check the PCB for burns & overheating. Also check for dry joints. Not quite sure what you mean when you say it does’nt feel broken ?
Re: Zanussi ZWD1471S refuses to drain – E20 error
Well, the pump was humming previously when it was still blocked – it’s only recently that I’ve noticed the noise gone.
To be honest, it’s been a bit of a saga. Originally, we started getting E20/E10 during the drying cycle. I opened it up, and the condenser was full of crud, so cleared that out. Then got E20 draining a bit later on. Checked the filters, large chunks of crud (related to the condenser clean out, possibly..), got rid of E20 for a while. Came back, checked the black piping inside. Found what looks like a lens out of a kid’s toy or something. Got rid of E20 for a while. Now it’s back again, except it’s this last time I’ve noticed the pump not humming.
I’ll have a look at the PCB though – I doubt I can replace bits easily, but I can certainly wave a soldering iron at any dodgy looking joints.
Re: Zanussi ZWD1471S refuses to drain – E20 error
Something else you need to check is the connections to the pump itself. Just re-read your original post, if you’ve stripped the pump apart the impeelor should’nt be hard to turn.
Re: Zanussi ZWD1471S refuses to drain – E20 error
Thanks for the advice. The spades themselves look fine, and they were connected properly – is it worth trying to do a continuity check to the main board?
The impeller wasn’t hard to turn really, but it was stiffer than I thought it would be. Certainly, if you flick it, it won’t spin freely – but I’m not totally sure what to expect.
That said, I found one new for a tenner, so I might just grab it to compare 🙂
Re: Zanussi ZWD1471S refuses to drain – E20 error
Are you putting the old pump back or are you fitting a new 1 ?
Whichever way, take a resistance reading across the pump coil & once you’ve re-connected it take a resistance reading at the pump harness connector on the PCB. The resistance should be virtually the same as you read across the pump coils within an Ohm or two, a much higher resistance indicates a problem. When you cleared all the gunk out of the machine did you blow out the pressure tube that goes from the tub to the pressure switch ?Re: Zanussi ZWD1471S refuses to drain – E20 error
Just as an update – I’ve replaced the impeller and that seems to have done the trick (touch wood). The resistances across the old and new were the same, but the old felt kind of gunky to turn, so I guess something got into the shaft of it.
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