Question about Comfort-Aire BHD-301 Dehumidifier

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Problem Compressor will not come on I have checked the compressor and it works. I think I need a new circuit board.

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I was able to find a part list on the internet and see a picture,description of the part, the part number, price, and availablity.

Posted on Sep 15, 2008

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Frigidaire dehumidifier stopped draining from hose


If you have a dehumidifier that is not producing any water then you are wondering what you need to do to get this thing to work for you. In some cases you may be able to do something and in other situations there may be nothing that you can do.

If you do not hear the
compressor running and the unit says that the humidity in the room is higher then the setting, then you have a problem with your dehumidifier.

A few things that can cause this are:

The
circuit board relay has gone bad...replacement of this board will often cost more then a new unit. This also is a very common problem with many dehumidification units.

The
compressor has failed...if you hear a buzz for a few seconds, every few minutes, then you have a bad compressor or at least bad start components on the compressor. Either way it again is a costly repair.

If the
compressor is running and the coils are not getting cold then you have a refrigeration system leak. Recharging or fixing these units is very difficult and is another costly venture compared to the price of a new dehumidifier.

If the
compressor is running but the fan is not, this also will cause low water production and continual freezing of the coil.

If the
compressor and the fan are running but the coil is totally blocked then you will get no water production. Air needs to be continually moved over the cold coil to get the water out of the air.

If nothing is running, then you may also have a
control board failure. Or the humidity sensor or humidistat has gone bad which tells the machine to run. If the sensor says that the humidity is low enough then it will never run.

Also if nothing is running check the
float switch or the bucket switch. Many of these switches are very touchy and if you do not have the bucket in place just exactly right it will not trip the switch to allow the unit to run. These switches often are more fragile then they should be and break easily. The good thing is that when available they are easy to replace and relatively inexpensive.

There are some parts available for a few brands, but with the prices for most of the parts that you can replace running anywhere from 40.00 - 80.00 dollars, replacement parts with labor to install them, makes a repair more then the few hundred dollar cost of many of these dehumidifiers.

As you can see there are quite a few things that can cause your dehumidifier not to work. Systematically go through the list and eliminate things to get to the bottom of the issue causing your problem and then decide if it is worth spending the money to try to fix the old unit. Only you can make that decision.

Aug 19, 2012 | Frigidaire Dehumidifiers

1 Answer

I have a GE AHH50LMG1 dehumidifier. It is less than 2 years old. When I turn it on, it displays 20% RH. The fan runs but the compressor does not kick in. I assume that is because it thinks the humidity...


Hi,
It could be just the sensor, but not likely... many times it is the circuit board that goes bad, making the repair almost prohibitive.. as the circuit board, if you can find one, is often half or more the cost of a new unit...
But you are correct... if the unit thinks the humidity is 20% then it will not bring on the compressor...that is what is happening...

heatman101

Jun 25, 2011 | Haier HD656E Dehumidifier

1 Answer

Dehumidifier does not extract water. Fan works and I've cleaned and checked all connections. How do I tell if tis a bad compressor or coil?


Hi,
It could be a abad compressor, circuit board, or maybe even a sensor or dehumidistat...
Here is a tip about dehumidifiers that run but do not extract water from the air..

Dehumidifier is running but no water is in bucket
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

May 03, 2010 | Whirlpool AD25BBR Dehumidifier

1 Answer

Unit fan is running but the compressor is not.


Hi,
It could be a bad compressor, circuit board, or maybe even a sensor or dehumidistat...
Here is a tip about dehumidifiers that run but do not extract water from the air..

Dehumidifier is running but no water is in bucket
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

Apr 24, 2010 | Maytag M7DH45B2A Dehumidifier

2 Answers

My 1 yr old Zenith ZD30 dehumidifier just stopped working all together. The bucket is empty and I checked the to be sure that a circuit didnt trip. Any suggestions as to what it can be?


The Zenith ZD30 is made by LG as many other brands are also. There is a fuse located on the control board. That may have blown. I have also had 3 LG units come into my shop with bad control boards. If the fuse is ok. Measure the ohms at the power plug L1 to Neutral, with the unit unplugged. It should read around 430 ohms. The ones with bad boards read real high. Hope this helps.
Rasske's Renewed Appliances

Oct 20, 2009 | Dehumidifiers

1 Answer

Dehumidifer runs for about 45sec to 1minute and then shuts off. wqhat would be making this happen


If it does that consistently, then it's likely that the compressor is overheating and shutting down. (It has a thermal overload circuit to prevent a potential fire). Another cause could be a malfunction of the control circuit board which runs all functions of the unit. To check for possible compressor problem, unplug the unit, remove the housing to expose the compressor, plug it back in and power it up. When it shuts down, feel the compressor. It should be warm to the touch, but definitely not so hot that it singes your fingers.

If you find that the compressor is just normal warm, then the control circuit board is shot and needs to be replaced. Check with the merchant or manufacturer for availability & cost. If prohibitive, you're better off simply replacing that unit with a new one.

Jun 10, 2009 | Goldstar DH304 Dehumidifier

1 Answer

Dehumidifier won't run


After all that testing you have diagnosed the problem. It is the main circuit board. So there is not reason to do any more test. I would just get a new control board and off you go

Apr 21, 2009 | Haier HDN305 Dehumidifier

1 Answer

Compressor will not kick on. Installed new circuit board and the compressor still won't work. The compressor does work when it is jumped.


If the fan runs, the only thing left in your case looks like the defrost control. Sorry I don't have my user ID and password for their service site here at home. I can look up a part number for you tomorrow if you'd like.

Sep 18, 2008 | Comfort-Aire BHD-301 Dehumidifier

2 Answers

NO POWER TO MY DEHUMIDIFIER


I took my dehumidifier apart and I found why the unit no longer would start.

First, there is a fuse inside the metal compartment that houses the control circuit board.
However, the fuse was not blown. Instead I found the relay that controls the compressor,
(circuit diagram calls it RY-COMP) was not functioning and was left in the open position.
The relay must switch the compressor on/off based on humidity, full water hopper, and
maybe other factors like temperature.

The RY-COMP is a large black plastic component on the circuit board with two
wires (blue and black) connected at the top. I tested the contacts and they remained
open when starting up the dehumidifier. Doing a small bit of rewiring so that the blue and black wire
were connected and also wired to RY-COMP terminal 3, the dehumidifier came back to life.
However, this is good for proving what broke but without an electronic control to cycle the
unit on and off and to halt when the water hopper is full it's not a valuable alternative and
it risks a burnout of the compressor from constant use.

I think the RY-COMP relay is a solid state relay which could have gone bad from a spike
in voltage when plugging the unit in or cycling on/off.

I certainly don't want to buy another unit where the circuitry is not robust enough to survive
plugging in every couple weeks. I was thinking I could try replacing the relay with a magnet relay which would probably survive spikes much better.

Mar 03, 2008 | Goldstar DH304 Dehumidifier

1 Answer

Dehumidifier not dehumidifying ...


Save the old one for parts if you get the same new one but I def. don't reccomend buying this unit again. The reviews are bad. The fan is not covered under the warranty except first year or extented warranty. I spoke with Kenmore & Sears about this to see if coverd under 5 yr. Only compressor,tubing & refrigeration system(see inside of front cover for warranty info.)

Sound more like a sensor/circuit board problem to me since fan is turning. I think the signal determins which setting fan needs via sensor assembly to run. I could be wrong. Justa thought.

Can you def. hear the compressor come on. You can look through grill to see fan spin & the compressor makes a clank/clunking noise/ The fan & compressor should turn same time. Good luck! If you got any info. on my fan problem & you have update or fixed your problem I ccould use some help. Check post for my problem.. Thanks! panfan1

Aug 13, 2007 | Kenmore 54701 Dehumidifier

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