I’ve already returned one Formaldehyde Cool Purifier mainly because it gave the same high readings of VOCs every night whether it was on, off or in auto mode. I ordered a replacement and now it is doing more or less the same thing. In auto mode it switches itself on presumably to deal with the high VOCs but the level does not drop for hours. It dropped after the same amount of time even if it wasn’t on but was still plugged in and continuously monitoring. Does this mean the filters are not working for VOCs or the particular VOCs its detecting? Or does it mean it’s creating a false VOC reading?
I’m also getting whines, whistling and buzzing depending on what settings its on and there seem to be a lot of posts on here about these things that haven’t been resolved by Dyson yet.
Best answer by Stuart
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