Question about Maytag M7DH65B2A Dehumidifier

5 Answers

Control panel flickers or dies, unit won't start

When pressing the Power button, the control panel either flickers, or does nothing. Then it dies completely. I removed the cover to see if there was anything obvious, but I did not completely disassemble it to look at the control panel. The flickering made me suspect that water might have gotten somewhere it's not supposed to, but not evident. I'd hate to toss out a perfectly good unit if there's just a loose wire somewhere, but these electronic panels can be finicky.

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  • Jeff Seigle Nov 17, 2008

    The unit is 4 years old so is well out of warranty, but life should be longer than 4 years for a $240 unit.

  • Jeff Seigle Nov 17, 2008

    Home Depot would not be the least interested in talking to me about a problem that occurred 4 years after purchase. I was looking for something along the lines of "Order x part" or "It's toast, time to recycle the copper."

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It looks to me like you will have to replace the control unit/panel. It looks to be faulty and the cause of this issue.

It could also be that 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.

Posted on Nov 17, 2008

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Hi,

Please confirm that your concern is a Maytag M7DH65B2A.

Initially, as the nature of the product itself, it is exposed to constant dampness within its confines. This subjects the electronics and electrical connection to moisture and therefore corrosion. Offhand, assuming that no parts require replacement, what is required is a dis-assembly to expose the electronics/electrical components and their various terminals, connectors and exposed wiring be cleaned. It may be to your advantage to check/re-solder any dull/grayish solder joints on the underside of the printed circuit board (PCB). A copy of the service manual would be of great assistance.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 17, 2008

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Q - My unit will not operate at all, help.
A - Unit may be unplugged. House fuse blown or circuit breaker tripped. Check the bucket, it may be full, empty it. Float not inside the bucket properly, adjust the float so it hangs in the bucket properly.

Posted on Nov 17, 2008

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Fickers tell that there is a loose connection or the water between the connection joints.
firstly let it dry or use a hair dryer.

Posted on Nov 17, 2008

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Take it back to where u purchased it and tell them it has stop working



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Shaun

Posted on Nov 17, 2008

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Hi ! Help! The arrow down button does nothing. Arrow up works fine. It is now at 55 percent and I wanted it at 45. It will not arrow down PLEASE tell me how to make it go down! thanks


Turn the Master ON/OFF Switch to OFF and unplug the unit for 15 minutes. This will give the electronics time to revert back to the original factory setting. The plug the unit back in and turn it ON.
When you press the Arrow Down button, do so in increments. Do Not push and hold the button.

If that does not solve the problem, you may need to replace the control panel.

Hope this helped you.

Jul 13, 2011 | Kenmore 54701 Dehumidifier

Tip

My Comfort-Aire BHD 651-C died


The Comfort-Aire crapped out again! We started the season with a little 17-pint Sears, but it wasn't cutting the mustard getting the accumulated moisture out of the cellar, so we fired up the Comfort-Aire 65-pint machine. It got the humidity down to 50% pronto, and kept it there for the better part of a week when all of a sudden it quit. Died! Nothing! Not a glimmer in the control panel, and pushing the buttons did absolutely nothing. Unplugging it and plugging it in again produced a faint "chirp" but that was all. Naturally, the thing is weeks out of warranty. Without the warranty, the nearest service place wants a $60 "consultation fee" just to look at it, so I decided to see if I could fix it myself before seeking professional aid.

After getting an exploaded view of the machine from the web, I removed the collection bucket, the filter, and the two screws from under the plastic front cover. In addition to the two screws, the cover is held by little tabs that fit into notches in the steel sides. To get the plastic cover off, I slid a wooden popsicle stick under the plastic, thus stretching the plastic enough to get the tabs out of their holes without scratchng the unit.
The front cover is tethered to the unit by a cable attached to a circuit board which forms the back of the push-button control panel. On one side of this circuit board there is a row of 14 soldered connections. They are very close together, and any conductive contaminent that gathers between them is guaranteed to short them out. That's apparently what happened to mine, for scraping between them with a toothpick, and cleaning them with a toothbrush
brought the unit back to life again. That's all it took to repair my Comfort-Aire. The plastic cover snaps back
in place easily.

on Jun 09, 2008 | Comfort-Aire BHD-651 Dehumidifier

1 Answer

My Comfort-Aire BHD-501-B is running. However, none of the control panel buttons work. I cannot turn it off with the on/off button. I cannot change the humidity set point using the up or down arrows. I...


I don't think it's a thermistor problem, as previous respondents have suggested. I have one of these units. The control panel has been nothing but trouble. The Power button works, but the Fan Speed button is stuck on High. The Humidity Up/Down buttons only work sporadically. Sometimes they work if I keep punching them. There doesn't seem to be any rhyme or reason as to when they work and when they don't. I think they're just cheap parts that have failed prematurely.

May 03, 2010 | Comfort-Aire HD-651 Dehumidifier

1 Answer

Haier HDN305 Dehumidifier


The Comfort-Aire crapped out again! We started the season with a little 17-pint Sears, but it wasn't cutting the mustard getting the accumulated moisture out of the cellar, so we fired up the Comfort-Aire 65-pint machine. It got the humidity down to 50% pronto, and kept it there for the better part of a week when all of a sudden it quit. Died! Nothing! Not a glimmer in the control panel, and pushing the buttons did absolutely nothing. Unplugging it and plugging it in again produced a faint "chirp" but that was all. Naturally, the thing is weeks out of warranty. Without the warranty, the nearest service place wants a $60 "consultation fee" just to look at it, so I decided to see if I could fix it myself before seeking professional aid.

After getting an exploaded view of the machine from the web, I removed the collection bucket, the filter, and the two screws from under the plastic front cover. In addition to the two screws, the cover is held by little tabs that fit into notches in the steel sides. To get the plastic cover off, I slid a wooden popsicle stick under the plastic, thus stretching the plastic enough to get the tabs out of their holes without scratchng the unit.
The front cover is tethered to the unit by a cable attached to a circuit board which forms the back of the push-button control panel. On one side of this circuit board there is a row of 14 soldered connections. They are very close together, and any conductive contaminent that gathers between them is guaranteed to short them out. That's apparently what happened to mine, for scraping between them with a toothpick, and cleaning them with a toothbrush
brought the unit back to life again. That's all it took to repair my Comfort-Aire. The plastic cover snaps back
in place easily.

Jun 07, 2008 | Dehumidifiers

2 Answers

Humidity buttons don't seem to work.


the control board is a very simple design and it is to signal and switch options like fan speed, power on/off, humidity up/down and sets the on/off run time. Like above the board does collect dust,but the true problem runs deeper.

My unit was stuck in run mode with the fan speed, humidity and run timmer non functioning. the unit worked and the power switch turned it on and off. The display said ON

I removed the front cover (two screws) and slight pressure on the side of the cover to remove it. This exposes the control board. The control board can be removed by removing the 6 screws on the board. the cable can then be removed by pulling out the multi-pin ribbon cable.

I diagnosed that only two of the 5 push button switched were functioning. There was also dust and mold on the board. This board is poorly protected from the moist air entering the unit and the constand moisture causes corrosion on the board, the switched seem to be the weak link.

By using a multi meter I noted that only the power switch and the humidity down button were making contact when pressed. Now it all came together. I could turn it on and off. and if you press the humidity down button to the lowers setting (ON) means run all the time.

I used a elecronic contact cleaner and sprayed it into each of the switches. I wiggled it around and blew it out with canned air. It took a few wiggles and blasts but all switched then made contact. I the board back on and tested all functions and it was like new. The contact cleaner should keep it protected for a while. The non functioning of the switches works both ways. They can stick on also. This would explain most of the other control problems. These switched are common and can be picked up at Radio Shack. On a do-it-yourself bananna scale it was a 2 for me, but I had the tools and the spray. I am not sure what sears gets for the PC control board,but this is the issue and if they were to address this the unit complaints would drop greatly.

Feb 03, 2008 | Kenmore 54701 Dehumidifier

1 Answer

Control panel lights up-nothing else happens


first check that the bucket is in properly. then remove bucket and push red button with finger with the unit on. if you are still getting a red alarm light it might be time to change the control panel. also unit does not work the same in cold weather. it will cycle too often. unit better used in summer-------good luck

Dec 16, 2007 | Kenmore 5365 Dehumidifier

3 Answers

Humidity Control


Sounds like the button may be broken. However, it could be a loose wire. Take the front off and see if any of the wires connecting the control panel and the unit are loose or disconnected.

If there is a ribbon cable connecting the control panel, see if any of the contacts are exposed when you disconnect it. If they are, you may be able to use a pencil eraser to clean them off. A service man from Sears did this on the control panel for my ceramic-top stove. He said if that didn't work then I would have to buy new control panels, which were almost the cost of a new stove!

Sep 09, 2007 | Kenmore 54501 Dehumidifier

2 Answers

A7dh65b2a


Normal operation, the unit has sensed icing and is in the defrost mode (compressor off and fan on high). When the ice melts normal operation will resume.

Dec 07, 2006 | Fedders A3DH30B2A Dehumidifier

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