Question about Haier HDN655E Dehumidifier

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Need to replace zener diode ZD2. I assume I would but 1.5v zener diode?

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You need a 5.1V Zener Diode. You can get a pack of two at Radio Shack for $1.50.

Posted on May 01, 2010

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Kenmore dehumidifier 25358400890 sometimes works, but sometimes won't run. Light comes on when bucket is removed, so it's getting power. Any clue why?

Assuming you've turned the humistat all the way to the maximum dry setting, it's possible it's not humid enough for it to run but fairly unlikely. The humistat may need to be cleaned or replaced or the compressor may be low on freon. If it works in hotter temperatures this may indicate low freon. Freon pressure increases with temperature therefore if it's hot, the pressure inside may increase enough to satisfy the low pressure switch.

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I have a HD456E/HD656E dehumidifier that has failed. It is plugged in; however, when the master on/off switch is depressed either the unit will not power on or if it does power on (with compresser...

It could be what you say or it could be that the humidification extraction level is set too High. Try lowering the extraction percentage to 32 - 35%.

If that doesn't help and you'd like to order replacement control board/panel. Call Haier Parts and Technical Support 877-337-3639. But, you may find it cheaper to replace the unit, then repair it.

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Totally shut down, no lights , nothing. It just quit as if someone pulled the plug. Is there a reset switch or is it now a piece of junk?

It either needs a new fuse or a new ZD2 diode. Both fixes will require you to take the unit apart. The fuse is easy to replace, but the diode will require soldering. Check out ...

Jul 24, 2009 | Haier HDN455 Dehumidifier

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replace 24 volt 1 watt zener diode on circuit board. 1n4749 (nte5081a)
mine was hit by lightning and this fixed it.

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Haier hdn305 dehumidifier does not turn on

Had the same problem with two HDN455's and took them to a local electronics repair shop. They replaced a Zener ZD2 diode for a total cost of $53 and now is working fine.

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We all appear to be in the same mess --Thanx Haier
This product says its Amana, but rest assured it is an Haier
The problem is most likely with the engineering design of the board. Im not an electrical engineer so be careful litning to me to closely :) There is only a half bridge rectifier on this board and 2 zener diodes that clamp down on the voltage. My guess on yours is the Zeners have been shorted and no longer clamping voltage down to aroun 24 volts for the low side of the board. I spoke with Haier and they have no schematics that state the zener specifications. They also said there was a 6 month backorder on ordering a new board. Oh and by the way if you want to order a new board and wait 6 months for the backorder it would cost you 75.00. All this jsut to repeat the problem again, because of bad design. O well ----- I wish products were not made better, so I wouldnt have to fill guilty about putting this in the landfills.

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1 Answer

45 Pint Capacity, Electronic Control - 115 volt Dehumidifier HDN455E - No power

Check the fuse on the board. If the fuse is ok
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If it's shorted replace.

Aug 07, 2008 | Haier HDN455 Dehumidifier

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Check Zener Diode ZD2 on the board to see if it's shorted.
If it's shorted replace it.

May 20, 2008 | Haier HDN455 Dehumidifier

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My Dehumidifier was dead

Check Zener Diode (ZD2) on the board to see if its shorted.

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