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Samsung washer WF419AAU bangs at around 250 RPM

Harmonic frequency

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#1 dannygr

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Posted 19 September 2012 - 02:42 AM

This is a 2 year old Samsung front load washer, model WF419AAU. Customer said it hangs up toward end of normal cycle, when she can put it into spin only cycle and get it to finish. Appears to be normal spin failure to complete.

I put it into spin in service mode with empty load. Between 200 and 300 rpm drum starts swinging wildly, then smooths out and spins perfectly up to 1000 rpm.

No error codes stored, although service mode will not enter PCB check; maybe bad instructions, as tech sheet is vague about initiating the check. But problem seems to be some kind of harmonic resonance around 250 spin rpm, not PCB.

Does anyone know if there is a fix for this? Normally, assume bad suspension or bent spider would just get worse the higher the speed.

Thanks,
Daniel

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#2 sh2sh2

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Posted 19 September 2012 - 06:36 PM

its normal on a samsung to have a heavy tub movement at the lower rpms till the ball bearings in the balance ring spread out

#3 dannygr

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Posted 21 September 2012 - 03:04 PM

Yes, I have watched them do that. In this case, with a load in, apparently it does not balance out enough for the spin cycle to complete, so the control keeps going back to the start of spin and the cycle does not finish.

Not sure why it does finish when she puts it in spin only, but she says it does.

Thanks,
Daniel




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