I have an amcor dehumidifier which does not have a filter. Every couple of years the performance drops noticably and I have to remove the outer casing and clean the dust and dirt off the fan and refrigerator elements. This is an awkward and messy job but improves the performance considerably and probably prolongs the life of the unit. It is well worth the effort but I wouldn't recommend trying it unless you are good at taking things apart and putting them back together!!! Don't forget to save the water and use it in you iron, especially if like me you live in a hard water area.
Mark Sutton
November 2006
They have compressors and are thus similar to air conditioners. There's alot to them. You can do stuff like filter changes without special training if they are well accessible. Otherwise is a pro job.
Lewis.
lewis
November 2006
clean filters if fitted blow out inside of unit with airline if ex drip pipe fitted check internal tray for dirt
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paul
September 2006
i can only think of replace air fillters what make are they