When installing the humidification filter (FY503x), make sure the logo side is up (as indicated in image below). Incorrect direction and installation may cause the water refill indicator to be mis-triggered.
Philips Support
My Philips Humidifier’s water refill indicator is on when there is water
Published on 21 May 2025
If your Philips Humidifier's water refill indicator is on when there is still water in the tank, read below to find out why.
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A small amount of water may be left in the water tank. For the best possible humidification performance, the appliance will alert you to refill in time.
If the above did not help solve the issue, please contact us for further assistance.
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