Washing Machines
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Washer smells, black mould in drum

Asked over 20 years ago 8,153 views
0

My washer smells horrible. I've had the outlet pipe off, I've had the pipe to the pump off, but these were all OK. The smell seems to come directly from the drum. I've tried washing using bleach and even dishwasher tablets but the smell comes back as good as ever. I can see some black "mould?" inside the expansion plastic "boxes", at least I think that's what they are but so far I haven't attempted to take these off. I'm wondering if something has got into the tub somehow but I've never had any trouble emptying etc. If that's the case is it easy to get into it?. Please help I'm fed up of wearing a nose clip.

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.

Washer smells from drum with visible black mould/gunge

The problem
The washing machine had a strong bad smell apparently coming from the drum. The user had already removed and checked the outlet hose and pump hose and found them clear. Bleach washes and dishwasher tablets did not stop the smell returning. Black mould-like deposits were visible inside plastic expansion chambers/boxes.
Likely cause
The accepted reply said the machine was likely contaminated with internal gunge causing the odour. A less likely possibility mentioned was a trapped sock or cloth rotting inside the tub, but this was described as rare and not supported by pumping problems.
What fixed it
Recommended action was not to strip the machine down at this stage. The accepted advice was to treat it as a gunge build-up problem and follow cleaning/prevention guidance for washing machine odours. The exact repair carried out was not confirmed in the discussion.
Checks to try
  • Outlet pipe removed and checked
  • Pipe to the pump removed and checked
  • Repeated cleaning attempts using bleach
  • Repeated cleaning attempts using dishwasher tablets
  • Visible black mould-like deposits inside plastic chambers/boxes
Cause identifiedGenerated 30 Oct 2026 · AI summaries can make mistakes - read the full thread below.
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1 Answer

Accepted Answer
0
Verified Engineer
Answered over 20 years ago

Your washing machine could be covered in gunge inside, which can be difficult to shift. I've also known cases where an old sock or cloth was stuck inside the tub (rotting away) although it's rare because a sock would normally find its way into the sump hose and fairly quickly stop the water pumping out. I'd be hesitant to strip the washer down to look though at this stage.

The main cause of washing machine gunge building up, and how to prevent and deal with it is explained here - I only use 40° washes is that OK? - Washing machine smells (gives off bad odour)

Whitegoods Help — appliance repair expert and forum host.

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