Question about Maytag M3DH30B2A Dehumidifier

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The compresser keeps turning on and off without and condensation Is it worth trying to fix, or should I just buy a new one

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Hi, You will probably be money ahead to buy a new one...

There are many reasons why a dehumidifier willnot work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrongwith their dehumidifier

Dehumidifier is running but no water is in bucket


Posted on May 17, 2011


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I have a boys 12ltr dehumidifier everything is working on it but it has stopped collecting water. The wall is damp and there is heating in the room. Can you tell me what to do

There are many reasons why a dehumidifier is not removing water from the air. Most likely is accumulation of dust and pet hair that restricts the air flow. If you can, unplug it, take off the covers and vacuum out all the dirt from the evaporator and condenser (little radiator like parts).
If the air flow is restricted, the compressor has to work harder to the point where the overload gets tripped. It may or may not be resettable.
If you do take the covers off, check that the fan turns freely and you may want to add a drop of oil to each end of the motor if there is a place to oil it. Light oil like sewing machine oil or light engine oil will do.
You cannot really tell if the compressor is working with all of the covers on; and I cannot recommend plugging it in with covers removed because there may be open electrical connections that you do not want to touch. However if the compressor is running, the outlet tube will get hot; that is the one that goes to the condenser [radiator like bundle of tubes nearest the fan] [it may get too hot to touch]. The evaporator [bundle of tubes farthest from the fan] should start to get cold where the tiny little tube from the condenser joins. If neither is happening and you are sure the compressor is running, it is out of refrigerant [freon] and may or may not be worth fixing. If the evaporator ices up [gets covered with frost] it may be low on refrigerant indicating a leak; again it may not be worth fixing.


Jan 30, 2015 | Dehumidifiers

2 Answers

My dehumidifier runs like a champ, but doesn't put water in the tank, it's been empty for a week or better. The coils don't get cold. Should they? This unit is 5-6 yrs. old. Do I need a new...

Mike, there are 5 things that could be causing the problem you're having. So, before you ruch out to buy a new one, try troubleshooting this one first.

Turn the unit OFF & unplug it before attempting any troubleshooting

1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have an analog unit, set
the humidity extraction level knob on Maximum.

2. Air intake filter is dirty or clogged. Turn unit OFF, & Unplug the
Unit, before removing to inspect & clean it, if necessary. If washed,
allow filter to completely dry before reinstalling. DO NOT operate
the unit without the filter.

3. Obstructed air flow. Maintain a minimum of 12 to 18" of clear air
space around the entire unit.

4. Cooling coils are dirty and need to be cleaned. Use warm water & dish washing liquid to
clean the coils. Rinse and wipe dry. Apply a light coating of WD40 to the coils.

5. Ambient air temperature at floor level is between 40 - 60 degrees.
dehumidifiers do not work well between those temperatures
(Unless, you have a Low Temp Unit). This applies mainly to
where the air temperature at floor level is colder than at shoulder level
in basement applications. Raising the unit up off the floor,
onto a sturdy table, counter top, etc, that can handle the weight
of the unit, plus a full tank of water, will usually resolve this

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.

If none of the above solved the problem, it ma be time to start shopping for a new dehumidifier. As repairs can often cost almost as much as a new unit.

Aug 08, 2011 | Fedders A7DH45B2A Dehumidifier

1 Answer

My dehumidifier keeps icing up, I have tried cleaning the coils but this has not helped.

This is because your system most likely has a leak in the refrigeration lines. Buy a new dehumidifier its not worth fixing invest in a new one. Humidifiers are made very cheap they really dont last.

Jun 21, 2011 | Haier AHD25 Dehumidifier

1 Answer

Fan runs constantly but compressor does not appear to be running. When lanel taken off the back, compressor is very hot to the touch. Worth fixing or better to buy new?

Hi, You are better off to buy new... fixing will cost more then new...
Here is a tip that explains what can be happening to make the dehumidifier showthat the bucket is full when it is not.

Dehumidifier Problem It shows Bucket Full


May 15, 2011 | LG LHD459EL Dehumidifier

1 Answer

Not condensing

Check to see if coils are getting cold, (run for 10 min. then unplug, and check inside unit). If they are, check and clean filter and coils. If not, most likely no economical to fix. Check consumer reports before buying a new one. New standards came in to play this year. Changed quality on the units.

Jun 02, 2010 | Maytag M7DH65B2A Dehumidifier

1 Answer

Apparently, the plastic fan is broken into many pieces and condensor is really hot. Is this worth fixing or buying new one?

You can maybe buy a new fan... but till you buy the fan and then install it for a unit that costs only a few hundred bucks...well you get the still have an old unit also...


May 06, 2010 | Maytag M7DH65B2A Dehumidifier

1 Answer

My Haier HD601 dehumidifier keeps popping breaker

If you are blowing the breaker then you are pulling way to much current on the startup or you have a short in the unit...
either way you probably will be much better off by replacing the unit with a new one... they do not cost enough that it is worth sinking hundreds of dollars into fixing an old one...


May 03, 2010 | Haier HD601 Dehumidifier

1 Answer

It does not turn on. The power light flashes on & off.

Probably a condensator that's busted on the power section of the electronics board, or a broken IC chip in the same section. The best thing to do would be to bring it to a technician to get it checked out. If it's just a condensator, get it fixed cause it shouldn't cost a fortune, if its an IC chip, most of the time it's cheaper to just buy a new unit.

Jul 07, 2009 | Daewoo DHC250 Dehumidifier

1 Answer

Dehumitifier wont condense water

This happened to me after the unit was turned on after being off all winter. I've had it just two years. After speaking with "support" I gather that it needs a new condenser, perhaps just because the freon may have escaped. It may be a sealed unit. Anyway, the math works out to simply discarding it and buying a new one. For me, this means not buying a DeLonghi. By the way, their service centers are strategically placed in remote areas to attract the fewest claims HD

May 03, 2009 | DeLonghi DE500P Dehumidifier

1 Answer

LG Goldstar dehumidifier runs constantly

sounds like the rheostat (aka rotary swithch) is opened (fried). can get new one on for 8.19 + s/h. need to know how to solder though. otherwise you will be looking at having to buy new unit for $120+

Jun 28, 2008 | LG DH30 GoldStar Dehumidifier

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