Question about Holmes Products Cool Mist HM3500 Humidifier

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My Holmes HM3500 Humidifier is plugged in and full of water. Just replaced filter. Filter has soaked water all the way up to the top of filter. Both lights are lit, but fan is not turning on. I have tried changing both the moisture and fan levels. Help!

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Hi there,

The tank may be full. Your dehumidifier has a safety device that turns off the dehumidifier when the water tank is full. Usually the tank itself either presses against a switch or there's a device connected to the tank that triggers a switch when the tank is in place and full.
If you've emptied the tank and the unit doesn't run, inspect the place where the tank rests to see if there's a switch or mechanism that's not being activated. You may be able to turn it on with a simple flick of your finger.

Post comments  for more help or information .........

Good Luck!!

Thanks

Posted on Dec 22, 2009

  • bstewart313 Dec 01, 2010

    This product is a HUMIDIFIER, not a DEHUMIDIFIER, so the advice you gave ALL-GURU will not work.... good try though

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Posted on Jan 02, 2017

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It sounds like you have hard water. How are you filtering this water before you use it? Distilled water is the best.

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Good Luck

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