Question about Honeywell Warm Mist HWM-255 Humidifier

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Won't turn on.

Machine has been packed away in box for a couple of years. Now we've moved and need it. We opened it and it won't turn on. None of the displays go on. Is there a repair facility in New York City?

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  • Anonymous Dec 24, 2008

    me too.

  • edws197 Dec 24, 2008

    me too.

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Hi My Unit will not turn on,bought last year,water fill icon flashes but no power.
is there a repair depot on Prince Edward Island? Or how do I get it looked after,
unit brought at Sears. Thanks in advance Norm

Posted on Nov 18, 2008

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1 Answer

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I am surprised that this answer isn't found anywhere, including in the manual from Kaz. If yours is the same version as mine, and your lights aren't even lighting up on top, most likely your float may have gotten bound up with gunk (the float rises up when the pan is full enough of water, which enables the motor to run. It is held into place by a plastic bracket with two phillips head screws, and looks a bit like a plastic bottle with a narrow neck in a small rectangular shape (not open at top). Remove the screws and the bracket, and take out the float and clean it and the reservoir (in the base) it sits in. Reinstall, and the float should move freely. Problem solved!

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1 Answer

I have a 2 yr old dehumidifier and it runs, it just won't pull out the moisture out of the air.


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1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have an analog unit
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2. Air intake filter is dirty or clogged. Turn unit OFF, & Unplug the
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3. Obstructed air flow. Maintain a minimum of 12 to 18" of clear air
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5. Ambient air temperature at floor level is between 40 - 60 degrees.
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If none of the above solves the problem, it may be a case of the compressor needs to be recharged with refrigerant gas or that the humidity condenser sensor has failed. These things usually occur in units that are 5 years old or older. It's rare in a unit younger than that. But, it can happen.

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4 Answers

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A console humidifier that fails to humidify a room could have a bad humidistat, fan switch or float switch--problems that take specialized equipment to diagnose. But before you call in a pro, it's worth your time to test the fan motor and float assembly, since repairing them is something you can handle on your own. Testing and fixing the fan Steps: 1. Test the fan motor. While the machine is plugged in and full of water, turn both the humidistat knob and fan-control knob to high. If the fan hums but does not turn, or turns slowly, the motor needs to be replaced. If the fan won't move, you may have a bad switch somewhere. Call a professional. 2. To replace a bad fan motor, unplug the machine and disconnect the fan wires from the switch panel. You may have to pry apart a plug, use needle-nose pliers to pull the connectors off the switch, or unscrew the connectors. 3. Remove the old motor from its housing, using a Phillips screwdriver or a nut driver and socket. 4. Remove the fan blade from the motor. Use adjustable pliers to open the spring clamp at the center of the fan blade, and then slip the clamp off. Use a flathead screwdriver to gently pry off the blade, then set it aside. 5. Take the motor to an appliance store to buy a replacement. 6. Install the fan blade on the new motor, then install the motor and reattach the wires. Testing and fixing the float assembly Steps: 1. Locate the empty tank float assembly. This assembly consists of a switch, a connecting rod (on some units) and some type of float. It's supposed to shut down the machine when the water reservoir is low, but if the float jams in the down position, the dehumidifier won't turn on. 2. Check the float and connecting rod, if there is one. If the parts are bent and touching the cabinet, use gentle hand pressure to straighten them so they move freely. If your dehumidifier has a float switch that is triggered by the filter housing moving up and down, make sure the housing is centered in its tracks and moves freely. Clean any debris and dirt out of the channels, using a scrub brush. 3. Check that the float connecting rod is contacting the float switch. If it isn't, bend the end of the rod so it touches the switch.

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