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How often should you clean a dehumidifier filter?
Clean the dehumidifier filter every 3 months. The commonly recommended range is every 3 months, monthly in the humid season. A clogged filter or slimy bucket makes the unit work harder and can spread the musty smell it is meant to remove.
A dehumidifier pulls water out of the air all season, and the filter and bucket collect dust and slime as it does. Cleaning them keeps the unit efficient and stops it smelling of the damp it is meant to remove.
Why does cleaning your dehumidifier matter?
A clogged filter or slimy bucket makes the unit work harder and can spread the musty smell it is meant to remove.
What happens if you skip cleaning your dehumidifier?
A clogged filter makes the unit run longer for less water, and a dirty bucket can grow mould and bacteria.
How do you do it?
- Unplug the unit. Switch off and unplug before opening anything.
- Wash the filter. Remove the filter, rinse it in warm water, and let it dry fully before refitting.
- Clean the bucket. Empty and wash the bucket with warm soapy water, rinse, and dry.
- Check the drain hose. If the unit drains continuously, make sure the hose is not kinked or blocked and still runs downhill.
- Vacuum the grilles. Clear dust from the air intake and outlet grilles.
What does it take?
How do you know cleaning your dehumidifier is overdue?
- Less water collected than usual
- A musty smell from the unit
- Frost on the coils
What do people get wrong?
- Refitting a wet filter
- Running the unit in a cold room below its rated temperature, which frosts the coils
When should you stop and call someone?
If the unit runs but collects no water, or the compressor keeps cutting out.
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Get the free appDoes this differ in the US, UK, Australia or Canada?
United States
Most basements need a dehumidifier through summer; aim for 30 to 50 percent humidity.
United Kingdom
Useful in winter for condensation, and for drying laundry indoors.
Australia
Most useful in humid coastal regions and in winter in cooler states.
Canada
Run in summer in basements; switch off in winter when heating dries the air.
Common questions
Why does cleaning your dehumidifier matter?
A clogged filter or slimy bucket makes the unit work harder and can spread the musty smell it is meant to remove.
What happens if you skip cleaning your dehumidifier?
A clogged filter or slimy bucket makes the unit work harder and can spread the musty smell it is meant to remove. Skipping it does not usually fail immediately, which is exactly why it gets forgotten: the consequence arrives months later as a repair bill rather than as an obvious fault.
Does cleaning your dehumidifier differ by country?
Universal.
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