Question about Maytag M7DH65B2A Dehumidifier

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I have 120 volts coming off the control board that switches from wire to wire feeding the fan motor but it does not run. Is there A safety swithc built into this some where?

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No there is not...if you have 120v fed from board to fan motor and fan is not operating, then you have a bad motor or capacitor.

Posted on May 11, 2010

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1 Answer

Dehumidifier will not run.


Hi,
Have they messed with the wires to the humidistat??
Either they are unhooked or they shorted out the wires and burnt out the transformer...

heatman101

May 14, 2010 | Aprilaire 1700 Dehumidifier

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Unit does not turn on when the on-off button is pressed. No indicator lights come on. The line cord is good - I have 118 volts across the black and white wires inside the cabinet.


This unit has a 12 amp 125v glass tube fuse on the control board. Chances are you blew this fuse. This can happen if the unit is starved for air and ices up. you must take the front of this unit off to access the fuse of this control board.

Apr 08, 2010 | Haier HDN655E Dehumidifier

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Dehumidifier will not run.


The power board or control board may not be functioning properly based on the information you provided. In order to best assist you I would recommend you contacting your HVAC installer or contact Aprilaire directly for further insight on this particular issue.

Mar 25, 2010 | Aprilaire 1700 Dehumidifier

2 Answers

Fan will not come on.


The fan has to run if the compressor is running as the fan assists in removing the heat from the condenser coil. Can you spin the fan by hand? If there is full power(120 volts) to the fan and it isn't running then the fan motor is bad. Also, if the fan motor has a run capacitor this could keep the fan from running(if the capacitor is defective) so look for this first.

Nov 15, 2009 | LG LHD45EL Dehumidifier

1 Answer

Fan motor stopped working, replacement went out too!


I would look for another outlet for you to plug it in before you start anything elaborate. I assume you've done this already but spin the motor/blade. If it spins and there is little or no play in the shaft or blades causing a blade to bind up the mechanical part seems ok.

Now if you have a volt meter First check the motor for voltage, Then if you have voltage, compare it to the rating on the motor. Usually a voltage within 10% is ok. Next test resistance on the wires of the motor any resistance and the winding is probably okay. If not then the motor is out again. If you have lost voltage the control board is your next part to test. No voltage out to the motor there on the board plug and the board is the problem Power there woudl mean the motor has too high a resistance and Id check the resistance on a differant known good motor before replacing it. just so you know where you started.

Mar 10, 2009 | Goldstar DH3010B Dehumidifier

4 Answers

Amana D530M Dehumidifier won't run


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.

Nov 04, 2008 | Amana D530M Dehumidifier

2 Answers

Goldstar DH304 Dehumidifier


Take cover off. First check the fuse on the circuit board. If it's blown replace it. That should get the motor running, the motor might be or is going out. If the motor is bad you'll have to replace the motor. If the fuse is good and the motor is good, unhook the wires on circuit board that go to the humidity control switch. If the unit comes on with the humidity control switch unhooked, you'll have to replace the humidity control switch. Sears has them for about $11.50. Hope this helps.

Sep 13, 2008 | Goldstar DH304 Dehumidifier

8 Answers

Kenmore 54701 Dehumidifier


I'm working on mine right now as we speak with the same problem , it runs for 3-4 minutes and then drops out and what I think I have found is the compressor comes on but the fan that blows over the condensor/evaporator assemblies never turns on ! I tore the covers of mine and put a volt meter across the orange and black wires (with the unit on high ) , on the little white plug in the metal box on a pc board , that all the wires go into and with the comressor off just before it starts on power up I have 122vac (volts ac) and then the compressor kicks in and it drops to about 107 vac but no fan action so I'm getting on line to order a motor assembly Kenmore # 4681A20040K ! I just happened across this site so I hope It works for me and helps you !

Jun 30, 2008 | Kenmore 54701 Dehumidifier

1 Answer

Compressor runs but fan will not come on.


Disconnect the motor leads for the fan motor, check the resistance through the motor when an Ohm meter. If you get no reading on the meter the motor is bad and needs to be replaced. also check the motor by rotating the fan. If it rotates with resistance the bearings may need lubrication. If it is a sealed bearing motor and no points for lubrication are there, replace the motor.

May 26, 2008 | Goldstar DH304 Dehumidifier

1 Answer

The main switch is broken off and it does not turn on


You have to remove the entire wrapper to get to the control circuit board, make sure you unplug unit!! Locate the small white wires that plug into the board and go to the humidity switch.Unplug the connector at the board and plug the machine in and see if everything runs. ps make sure you reinstall the bucket or unit will not run. If machine runs replace that humidity control. The plug on the board is usually white. The other white wire is 4 the light. I hope this helps./

Sep 05, 2007 | Goldstar DH304 Dehumidifier

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