Question about GE AHG40LJ Dehumidifier

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Either the humidistat is bad and not letting the unit cycle off, there isn't enough humidity in the air, or the condensor coils are too dirty.

Posted on Nov 16, 2007

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GE dehumidifer fan making loud knocking noise

possibly have to take motor and fan out as a unit to get fan off .

Sep 19, 2015 | General Electric AHH40LH Dehumidifier

2 Answers

After an hour, the refrigeration unit begins to freeze up. Condensation appears on top of the dehumidifier cabinet. I have eliminated all obstructions to air flow, including the filter. What can I do?


The most common cause of frost and ice buildup on a dehumidifier is because the unit is operating in temperatures that are too cold. Many dehumidifiers are not equipped to run at temperatures below 65 degrees Fahrenheit.
To fix this problem, Position the dehumidifier in an area where there is at least one foot of clearance around the unit in order to allow for proper air circulation during its operation. Close all windows, doors and other outside openings to make sure your unit isn't attempting to remove moisture from areas outside of the immediate room. Determine the temperature of the room by checking a nearby thermostat or by using a hand-held thermometer.

Check the filter for dirt and buildup. Unplug the unit from the electrical source and check the filter by opening the filter compartment. If the filter is dirty, it will restrict airflow through the unit and lead to freezing. Soleus recommends lightly vacuuming the surface of the filter to remove dirt. The filter also can be washed in warm water if it is extremely dirty. Once clean, place the filter back in its compartment. Allow for the ice to melt and then restart your dehumidifier.

Sep 10, 2011 | LG LHD45EL Dehumidifier

1 Answer

Unit is in the basement. After 5 years the coils started to freeze up all the time and the compressor still runs

Dirty filter or coils would cause this problem, low charge would as well but clean the coils first. Or stat. setting could be set to low below 72 degrees can cause it to ice up.

Jul 04, 2011 | General Electric AHH40LH Dehumidifier

1 Answer

How do I clean the dehumidifier?

A dehumidifier works just the way an air conditioner works but in a reverse manner. If you encounter a problem with your dehumidifier then it would be repaired the same way you would repair an air conditioner. As such a dehumidifier does not require much cleaning apart from changing the filter. When the filter and coils of the dehumidifier are choked with dirt, it may not pull out moisture from the air properly. The efficiency of the dehumidifier gets decreased and the only solution is, to clean it thoroughly. In order to assist you with the cleaning procedure of a dehumidifier, following are a few tips:
  1. Remove the water tank/container and clean it after draining the water. Depending on the usage the container must be cleaned regularly.

  2. Cleaning or changing the filter is also important for the main function of ensuring a healthy atmosphere is performed by the filter. Mix some bleach with warm soapy and clean the filter. It will help to get rid of the bacteria, molds and mildew.

  3. Use a vacuum cleaner to clean the evaporative coil/hot coil. Scrub off the dirt using a brush but make sure that you don’t bend the fins while cleaning.

  4. Clean the condenser or the cold coil the same way. If the humidifier is working in a room where the temperature is below 60 degrees Fahrenheit then check the coils whether it is not icing up.

  5. See to it whether the fins are bent or not, if they are bent then straighten them out using a fin comb otherwise it might obstruct the effective working of the dehumidifier.

  6. And yes do not forget to clean the fan blades and other parts of the dehumidifier.

  7. Keeping in mind the humidity level of your room, sets the humidistat of the dehumidifier as keeping it too low or too high may only make the dehumidifier to run longer than necessary.

Also before you start with the work of cleaning the dehumidifier, make sure that it has been unplugged.

Aug 17, 2010 | Fedders A7DH45B2A Dehumidifier

1 Answer

Unit doesnt seem to be removing humidity. its

Check the auto defrost sensor. They are known to become defective. Bypass or remove the device and unit will run normally, almost. WARNING: without the defrost sensor the unit will tend to ice up in cooler ambient environments. If sensor is removed watch carefully and only use in summer months. The dehumidifier may also be fixed by replacing the sensor but the design for repair is different and requires a costly modification.

Jul 17, 2010 | GE AHG40LJ Dehumidifier

1 Answer

My coils are freezing up

Make sure the filter is clean and plenty of air comes through, when coils freeze it is usually caused by low air flow coupled with lots of humidity and low air temperature in the space to be cooled. Clean the filter, fan and gently brush all dust and debris from the intake of the cold coil and retry it. If the basement is already cool and you are trying to dehimidify you should use a dehumidifier that features defrost controls.

May 26, 2010 | Whirlpool AD50USS Dehumidifier

1 Answer

Coil Freezes up. Filter Clean. Temp is low 60s.

Unless you have special model, that's what happens at 60 or less. defrost over a drain (it won't run into the bucket) and move to wamer location or face a electric space heater 2-3 feet from it

Dec 02, 2009 | Maytag M7DH65B2A Dehumidifier

1 Answer

Icing up on our dehumidifier

typically happens when there is a lot of dust in air. Try cleaning it VERY well, which would mean, shutting it for a few days, letting it melt and dry off, then not only vacuuming it, but then take an air gun (or Air in a can) and get the dust off the coils. Obviously if there is a filter clean it, or replace it.
Check for bent fins on the coil. Most of the newer ones (and yours should as well) have an auto defrost to help with that.
Good luck

Jun 25, 2009 | DeLonghi DE40P Dehumidifier

3 Answers

Coils Ice Up and nothing is dehumidified

If the coil is clean, then have a tech check for a low charge. This will cause the coil to freeze up. Humidifers are known to lose gas and owners aren't told this so end up buying new one and scraping the old one. Trust me on this. I have seen this many times. I repair high end machinery as my business.

May 30, 2009 | Maytag M7DH65B2A Dehumidifier

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