Question about Maytag M3DH30B2A Dehumidifier

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Mold collecting on coils

When I took out the air filter and looked inside, it looked quite dirty on the face of the ribs that cover the coils. So I took the unit apart and discovered tufts of mold. Why is this happening? Should I attempt to clean it myself, and if so, how?

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Spray viniger on the mould... hose off after 20 minutes... avoide getting any electricals wet... cover them if possible

Posted on Apr 02, 2009

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My dehumidifer runs but no water is being pulled out


Might be a dirty coil and condenser.
I have had a AD75UST0 WHIRLPOOL Dehumidifier for several years. If it actually still runs, I would suggest you take off covers and give the coils a good thorough cleaning. Otherwise the units are not designed to be serviceable aka - "disposable small appliance". if you do dispose of it take it to a qualified recycle organization for Freon products. Shut unit off. Remove "bucket". You should find a "tab" at top of where bucket goes in middle front of unit. Pull down to remove tab of Filter. Clean thoroughly and dry Filter before re installation. Visually inspect the coils and condenser while filter is out ( a flashlight helps). If it looks slightly dusty or like covered in felt, then it would be wise to remove front and rear covers and give the coils and condenser a thorough cleaning.

WHIRLPOOL DEHUMIDIFIER Parts Model ad75ust0 Sears PartsDirect

Apr 18, 2013 | Whirlpool 75-Pint Dehumidifier

1 Answer

The fan is running, but it is not removing moisture. The compressor does not appear to be coming on. I removed cover and cleaned inside. There was not very much accumulation of dust on the coils.


There are 5 basic, yet solvable reasons for what you described. Please pay particular attention to numbers 1 & 2.

1. The humidity extraction level is set to HIGH. Lower it to 32-35% If you have an analog unit
(no LED Screen), set the humidity extraction knob to 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
problem.

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 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.

I hope this info helps you to further troubleshoot & solve the problem. Thanks for choosing FixYa.

Aug 25, 2011 | Whirlpool AD50DSL Dehumidifier

1 Answer

Quit collecting water


Hawkster, there are 5 basic, yet solvable reasons for what you described. Please pay particular attention to numbers 1 & 2.

1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have an analog unit
(no LED screen) turn the humidity extraction knob to 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
problem.

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.

I hope this helps you to troubleshoot and solve the problem. Thanks for choosing FixYa.

Aug 17, 2011 | Haier Dehumidifiers

1 Answer

Fan works. Filters and clean. Heater a Can aster seems warm. Room is damp. Unit does not produce water


There are 5 basic, but solvable reason for what you described. Please pay particular attention to numbers 1 & 2.. Yiu have already cleaned the filter, so that one's covered.

1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have a mechanical unit
turn the control knob to Mai=ximum.

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
problem.

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.

Hope his helps you to further troubleshoot and solve the problem. Thanks for choosing FixYa.

Aug 02, 2011 | Goldstar DH304 Dehumidifier

1 Answer

Lcated in basement, quite humid; humidifier runs but not drawing any moisture into the container.


There are 5 basic, yet solvable reasons for what you described. Please pay particular attention to numbers 1, 2 & 5..

1. The humidity extraction level is set to HIGH. Lower it to 32-35%. If you have a
mechanical/manual unit, set the control knob to 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
problem.

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.

I hope this helps to your troubleshoot & solve the problem. Thanks for choosing FixYa.

Aug 01, 2011 | Fedders A7DH45B2A Dehumidifier

1 Answer

Deumidifier is running but the bucket won't collect any water. I've set the desired humidity level to 35% (ambient humdity is 75%) as well as cleaned the filter


There are 5 basic, yet solvable reason for what you described. The first 2, you have already covered. If our unit is operating in a basement, pay close attention to # 5.

1. The humidity extraction level is set to HIGH. Lower it to 32-35%.

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
problem.

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.

I hope this was of help to you. Thanks for choosing FixYa.

Jul 24, 2011 | LG LHD45EL Dehumidifier

1 Answer

Hi. Our dehumidifier is kept in the basement. It collected water for about three years. Now it runs but does not collect water. I cleaned the filter, took the water bin out and put it back in, but it...


Gweinstock1, there are 5 basic, but solvable reason for what you described. Please pay particular attention to numbers 1 & 2.

1. The humidity extraction level is set to HIGH. Lower it to 32-35%.If you unit does not have an
LED screen on the control panel, turn the manual control to 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
problem.

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.

Hope this helps you to troubleshoot and solve the problem. Please let me know. Thanks.

Jun 29, 2011 | LG LHD459EL Dehumidifier

1 Answer

FROST COLLECTS ON TOP


Hi, rewolff. The problem you're experiencing, with your dehumidifier is usually caused by basic things. That can be fairly easy to solved:

1. Air intake filter is either dirty or clogged: Turn the unit OFF & Unplug it before removing the filter.
Be sure the filter is completely dry, before reinstalling it.

2. Refrigerant cooling coils are dirty aand need to be cleaned. This will require removing the face of
the unit, to access the coils. They should be cleaned with warm water and dish washing liquid.
Then rinsed and thoroughly dried. After they are dry apply a light coat of WD40 to the coils.

3. Air obstruction. The unit requires a minimum of 12" clear air space on all four sides of the unit.

4. If the unit is being operated in a basement, the air temperature at floor level is colder then the air
temperature at floor level. Unless, your unit is a "Low Temp" model, getting the unit up off the
floor, on to a sturdy table, cabinet top, etc, that is sturdy enough to handle the weight of the unit,
plus a full tank of water, will usually resolve the problem.

Your model has been discontinued by LG, but they still support it. So, if none of the above solves the problem, contact LG Customer Service for more detailed trouble shooting at 1-800-243-0000.

I do hope this helped you to do your own troubleshooting and hopefully solve the problem. Please let me know. Thanks.

Jun 17, 2011 | LG LHD45EL Dehumidifier

1 Answer

We need to have the condenser repaired or replaced. No water collects when machine is turned on. Where can I find a qualified repair man in Cumming,GA?


Before you have it repaired, there are several things you can troubleshoot and solve yourself, that won't require any repairs.

1. The humidity extraction level may be set to High. Lower it to 32 - 35%.

2. The air intake filter is dirty or clogged. Turn unit OFF, unplug it before removing and cleaning the
filter. If you wash the filer, it must be thoroughly dry, before reinstalling it.

3. Obstructed air flow. To function properly, there must be a minimum of 12" clear air space around
the entire unit.
.
4. The cooling coils are dirty and need to be cleaned. Remove the front cover and filter to access
and clean the coils with warm water and dish washing liquid. Rinse , thoroughly dry and coat
coils with a light caating of WD40.

5. The air temperature at floor level is between 40 - 60 degrees F. Most dehumidifiers don't function
function well in that temperature range. Especially in a basement application. The ambient air
temperature at floor level is colder than at chest level. Set the the unit on a sturdy table, counter
top, etc, that can handle the weight of the unit & a full tank of water.

Conduct an in-home test, to check humidity extraction: Place the unit in your bathroom, plug it in and set the humidity extraction level at 32 - 35%. Turn the shower ON hot enough to generate steam. Close any window(s) in the bathroom and Do Not turn the exhaust fan ON. Close the door as you exit the room and wait 15 - 20 minutes before returning. After the time has elapsed, open the bathroom door, turn the shower OFF and allow the unit to run 5 more minutes. Then check the water collection bucket for any signs of water. If you see any, the unit is working as it should and one of more of the above solutions took care of the problem.

If the unit showed no signs of humidity collection (water) in the bucket and you want to have it repaired. The closest Delongi Authorized Service Center(s) to you are in Florida (please see the following link) http://www.delonghiusa.com/index.php?service

I hope this helped you further troubleshoot and solve the problem without having to make a repair. Please let me know. Thanks.

Jun 16, 2011 | DeLonghi DE500P Dehumidifier

1 Answer

Coils on the dehimidifier are dirty resricting air flow how do I get ti apart to clean the coils


Make sure you unplug the unit first. there should be screws at the base, in the back, or underneath the humidifier. Once you remove all the screws the cover should come off as one big piece. Careful when removing the cover, however, as there may be ground wires attached to it . Usually if you vacuum out the inside godd and around the copils that may help with performance. You can also buy a special acid that you can spray on and rinse off with water that removes alot of residue.

http://www.iallergy.com/product841/product_info.html
'
Also, Don't forget to pull the plug, shut the water valve and drain the unit. A unit with a water reservoir should be drained and cleaned with white vinegar, a mix of one part chlorine bleach to eight parts water or muriatic acid. Mist-type humidifiers also require regular cleaning to remove mineral deposits.

Mar 30, 2011 | Goldstar DH504EL Dehumidifier

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