I have a heat pump dryer that's stated to smell a bit kind of a mildew smell I suppose. Because of this, I've taken to ensure that the clothes are out of it almost immediately e.g. no leaving overnight like I used to be able to with a vented dryer.

Steps I've taken to minimise the smell

  • Take clothes and water out as soon as possible
  • Leave the water catchment outside the dryer.
  • Tried calling the dryer vendor and did not get any good suggestions.

What I've considered

  • Dismantling the dryer to clean the internals (Many problems and challenges with this)

What next

I'm a little stuck getting the smell out of the dryer, so id love to know a viable solution.

  • Can you please explain what you mean by "heatpump dryer" please?
    – Lefty
    Mar 17 '19 at 13:45
  • @Lefty here is a description canstarblue.com.au/appliances/heat-pump-dryers. Mar 18 '19 at 6:58
  • It sounds like an interesting approach. I've had the same condensing dryer for about 16 years and never had any problem of the sort you're having. I only clean the condenser about every 2 years as well. Have you had the dryer very long?
    – Lefty
    Mar 18 '19 at 15:53
  • @Lefty About 6 months, maybe it's a problem that only affects heat pump dryers Mar 18 '19 at 22:27

If it behaves like a conventional heat pump by extracting the humidity (water) from clothing. The water condensed has to go somewhere. Perhaps it is a drainage issue. Standing water will help mold and mildew grow..hence the smell. This is the first time I have heard of a heat pump dryer so I am just speculating.


I've a Bosch HPC dryer that advertises itself as having a self cleaning condenser, and there isn't a noticeable smell after two years use. I'd look at cleaning all easy access areas that moisture builds up first - the condenser unit should be removable for cleaning, as should the water tank. The compartment the condenser sits in would be a prime candidate too. If the dryer is connected via a permanent drain system to the wate water pipes, ensure the trap that prevents sewer smells entering the dryer is working properly

I suspect that HPCs may be more liable to mold growth because they don't run as hot as a standard condenser


I have a Bosch Heat Pump Condenser Drier and we've been wondering where this horrible smell is coming from for months. Today I decided it was the drier. No obvious way of cleaning it. It has a self cleaner in it which I see is riddled with drier lint. I assume that lint has gone into the drier somewhere and needs a clean out. Perhaps there is a maintenance / service option.

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