Samsung WF90F5E3U4W issue on agitation (I think!)
I've been through the common problems and I seem to have the reverse issue... Our machine will spin (if it manages to get to that part of the cycle), but it seems to have issues with agitation (almost as if is slipping). I have replaced the belt but the issue still persists. Putting it on just a spin, it does a weird sort of jerky agitation as if it can't turn the drum successfully, sometimes it manages to get past this bit and go into a normal spin, but sometimes it doesn't.
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Samsung WF90F5E3U4W jerky tumble/agitation and intermittent failure to start spin
- The problem
- The washing machine would sometimes spin, but struggled to turn the drum during tumble/agitation and at the start of a spin cycle. The drum movement was described as jerky, as if slipping, and it would sometimes give up before reaching full spin. The drive belt had already been replaced with no improvement.
- Likely cause
- A fault in the electronics/PCB was considered the strongest diagnosis from the discussion. Belt slip and motor brush issues were discussed, but the original poster reported no visible water leak onto the belt, and a forum reply said the symptoms looked more like an electronic fault or motor-related electrical issue than brushes or the belt.
- What fixed it
- The PCB was replaced by the original poster. This was tried after discussion narrowed the fault to electronics, motor, or related components, with caution that replacing parts would otherwise be a gamble.
- Checks to try
- Drive belt replaced
- Checked for visible leakage onto the belt
- Observed intermittent failure at start of spin cycle
- Observed machine sometimes reaching normal spin after restart
- Parts or tools mentioned
- Drive belt
- PCB
Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.
8 Answers
Hello Findon. The important thing to establish here is when the motor struggles to turn on the wash is it sparking excessively? However, this question is only relevant if your motor is fitted with carbon brushes and not all washing machine motors are these days. Worn or sticking carbon brushes is a common cause of a motor struggling to turn on wash but it will usually affect spin too.
So if there is no sparking the other thing to check is that the belt isn't slipping. The belt could slip if water is leaking onto it, though that is quite rare and it would expect to notice a leak. Or it could slip if it is just not tight enough - How tight should the drive belt be
Failing that it sounds like it could be a fault with the motor, especially if it is one that doesn't have carbon brushes and is therefore an induction motor. It's possible you could have a faulty field coil. It is theoretically possible for a problem with the electronics and the module to cause problems too so I would be very wary of just replacing the part and hoping it will fix it.
Need Professional Help or Spare Parts?
There's doesn't seem to be any leakage onto the belt (certainly not that I can see).
Here's a video of it failing to start on a spin cycle. it eventually gives up.
That looks like a poss electronic fault such as a start capacitor or fault on motor or components in the PCB. Not carbon brushes or belt.
Need Professional Help or Spare Parts?
That sounds bad
Just turned it off and on again (classic fix). This time it got past that point, but still didn't look great. Then here is a video of it spinning happily! Stupid thing!
But at the end of this cycle it has a minute where it tries to do the agitation/tumble part of the sequence and i bet that fails, will get another video...
Thanks so much for getting back to me so quickly by the way! Here's a video of the end of the 15 minute spin cycle - it went crazy as expected - you can ignore most of the noises in the background that's my Wife making dinner :);
New PCB seems to have fixed it. This would have been a very expensive gamble if not for your advice! Thank you for that.
Ha ha it was still a gamble. I never said it was the PCB but well done
Need Professional Help or Spare Parts?
But you narrowed it down to 3 things... plus I knew I could send the PCB back if I fitted it carefully and it didn't work So it was an easy thing to try. Thanks again.
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