Question about Fedders A3DH30B2A Dehumidifier

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A7dh65b2a i have a 65 pint dehumidifier for two years and it's starting to give us problems. it does frost up but i just turn it a few days and it's fine. the problem is that it wont't shut off, i have to unplug it. and the fan speed only runs on high, you can press the fan speed switch but nothing happens. any suggestions?

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The thermistor is bad. Believe me - I know this too well. Bought 2 of these and both died w/ this same issue right after 1 yr warranty expired. The thermistor is located on bottom-right side of evaporator coil. It has a chrome metal clip that holds it against the evap coil copper tubing. It also has a 2-wire harness that runs out of it up to the front-panel control board. Beware that if you had a big ice-up like this, there is potential damage to the power control board too. It will get a puddle of water under it when the ice thaws and this will cause the circuit board to corrode. Your power control board probably has corroded due to condensation from the extended freeze-ups. If you're lucky, you might be able to clean off the corrosion and it may still work. To fix the freeze-ups, you can order another front panel control board (the one w/ all the LEDs/controls/7-segment displays on it). It comes w/ all the sensors (including the thermistor). It was ~$38 when I purchased it at RepairClinic.com (twice...).

Posted on Oct 01, 2007

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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.

Posted on May 15, 2007

  • Mark Giammalvo May 15, 2007

    You are fortunate this is working. This feature normally fails on this model and its counterpart (Maytag M7DH65B2A).

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1 Answer

Haier 45-pint dehumidifier unit cannot be turned on. It has been running fine last few days.


The first thing that comes to mind, is have you emptied the water collection bucket recently? If so, be sure that the bucket was properly reinstalled and is making contact with the bucket safety removal switch.

If you haven't emptied the bucket in the past few days, it may simply be full and will not start until it's emptied.

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To find the Annual Energy Cost, look in the Owner's Manual or other paper work that came with the unit. The Energy Star rating paper work will have that information. However, that cost does not include routine maintenance cost or any repairs that may arise from running the unit constantly for 360 days. Sounds like you'll be running it in a damp basement.

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I have a Haier 65 pint dehumidifier. When I press the control button to lower the humidity setting, the word On comes up and I do not see numbers lowering.


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Frost


Hi,
Dehumidifiers2_bing.gif freezing up can be causes by a few different problems.
Here is a tip that I wrote to help people with the freezing dehumidifier2_bing.gif problem....

Dehumidifier2_bing.gif is Freezing up and not working
http://www.fixya.com/support/r4662033-dehumidifier_freezing_up_not_working

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Tyies to Start


Hi,
It could be a bad compressor, circuit board, or maybe even a sensor or dehumidistat...
Here is a tip about dehumidifiers2_bing.gif that run but do not extract water from the air..

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http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

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Unless equipped with special equipment most dehumidifiers will produce little if any water under 65-70 degrees. Many state operation down to 50-60 degrees but this was under lab conditions and therefore a marketing tool. The best performance is gained when the air temperature is above 70 degrees. The water you are finding is from melting frost, if you have a humidity problem you should be adding heat to the area to be dried, warm air holds much more moisture than cold and drying is much more effective if you can heat the area to around 80 degrees.

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Fedders 65 Pint Dehumidifier Fan Problem


I have the same problem. The fan motor bearings are bad on mine. You can get a new fan motor at Appliance Factory parts.com. Phone number 1-800-955-7075. $44.95 + shipping.

Gene

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Dehumidifier


if it does not get cold anymore, then a freon charge is necessary, provided the compressor was not damaged from "left it on for a long time once and found that ice had developed on it. I know that being left on could cause a problem"

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5 Answers

Dehumidifier frosts up


A dehumidifier will often frost up if room temperatures are colder than about 65 degrees F. If your room temperature isn't this cold, airflow to the unit may be restricted or blocked entirely. 1) Be sure the unit is set far enough from the wall so that airflow isn't restricted. 2) Clean the evaporator coils. To do this, unplug the dehumidifier and take off the outer cover. Allow excess moisture to evaporate from the coils. Then, using a brush attachment on a vacuum cleaner, remove all dust buildup. If necessary, cover the motor and electrical parts with plastic sheeting and spray with water.

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