Question about Fedders A7DH45B2A Dehumidifier

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(2) Problems 1st Problem: I have a 4yr old A7DH45B2A ser# AS782811 023w with a R6DH45X cover and controls. What gives? 2nd Problem: Coils won't cool; compressor gets very hot; humidity readings not reliable. What do you recomend?

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  • 195 Answers

The first clue is the age of the unit is highly suspectable as these units have a use life of 3-5 years and cannot be serviced without spending more money than a new one would cost. Solution recommend,throw away and purchase low end priced unit and save money.

JTHOMEFIX

Posted on Mar 16, 2009

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1 Answer

My dehumidifier ddr557he will no longer defrost. How do I repair this?


well there are three things i know of that can cause this :
1st your filters are dirty needs cleaning .
2nd your humistat is set too low , unit runs too long with out a cool down period , 70% rh is a "normal" setting
3rd in older units that might be getting up there in years its possible that some of the cooling gas has leaked out and this causes freeze ups

Oct 26, 2014 | Danby DDR557 Dehumidifier

1 Answer

Unit is not producing any water


Fandymay, 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 your unit is manually
controlled, turn the humidity extraction know 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 troubleshot & solve the problem.

Jul 08, 2011 | Fedders R6DH45X Dehumidifier

1 Answer

Everything works , but cooling coils do not cool?


Hi,
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

heatman101

Jun 25, 2011 | Fedders A7DH45B2A Dehumidifier

2 Answers

I have a Fedders dehumidifer model # A70145D2A-A-R. It is a few years old and it's worked pretty great but now it just runs continuously and no moisture is gathered. What can I do to fix it? I was...


You'd be hard pressed to find a Fedders like yours. They've been out of business for several years.

There are several basic things that can cause what you described.

1. The humidity extraction level is improperly set. Lower the level to 32-35%

2. A dirty of clogged air intake filter. Turn the unit OFF unplug it and remove the filter for cleaning.

3. Obstructed air space. A dehumidifier requires a minimum of 12" clear air space around the entire
unit.

4. The ambient air temperature at floor level is between 40 & 60 Degrees F. Dehumidifiers do not work well in that temperature (Except low temp models). This especially true in a basement application, because the air temperature at floor level is colder than say, chest level. Raising the unit up off the floor onto a sturdy table, cabinet top, etc, that can handle the weight of the unit, plus a full tank of water, will normally resolve that problem.

5. The cooling coils are dirty and need to be cleaned.

Critical problems:
1 The humidity sensor has failed an needs to be replaced.

2.The compressor is low on refrigerant gas and needs to be recharged.

Sometimes the repairs (Time spent finding, the Parts & labor), if necessary, can cost almost as much or as much as a new unit, which would have a full warranty.

Hope this helped you troubleshoot the basic and solvable problems and you won't need to make any critical repairs. Please let me know. Thanks.

Jun 16, 2011 | Fedders R6DH45X Dehumidifier

1 Answer

My dehumidifier ices up. It will not remove moisture when it ices up. What can I do and is it under warranty?


Hi,

The coils you see on the back of your dehumidifier are the evaporator. When the unit runs, the coils get very cold. As the fan draws the room air over the coils, the humidity in the air condenses out of the air onto the cold coils. But, if the temperature of the air the fan draws over the coils is too cool, the humidity that condenses out of the air freezes on the coils. To remedy this problem, you can try any of these: Warm up the room the dehumidifier is in. Put the dehumidifier on a sturdy table (the room air is coolest near the ground). Turn the unit off until the room warms up.

Take care.


Aug 10, 2010 | Fedders A7DH45B2A Dehumidifier

1 Answer

Unit runs but the coils dont get cold


The compressor should be cool near the bottom and hotter at the top. If it runs but the coil is not cool, it probably lost its charge. Developed a leak and lost all the refrigerant.

Jun 28, 2010 | Fedders A7DH45B2A Dehumidifier

1 Answer

The coils are freexing up. How can i fix this? fedders dehumidifier a7dh45b2a


Make sure your coils are clean and free of restrictions and that the fan is running. If this is ok, then it is probably a leak in the system resulting in low charge. Cost of new dehumidifier will be cheaper than having it repaired.

Oct 03, 2009 | Fedders A7DH45B2A Dehumidifier

1 Answer

Dehumidifer quit working


Looks like I am in the same boat as all of you. Identical issue with the A7DH45B2A model.
Bad compressor?

Aug 01, 2006 | Fedders R6DH45X Dehumidifier

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