Question about Fedders A7DH45B2A Dehumidifier

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Unit will turn on but wont do anything

Had the unit for about a year never turned it on recently moved placed the unit in studio lights come on but not a sound.

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  • Anonymous Aug 29, 2008

    The lights are on, but the unit says the room humifity is 20%. I suspect this is the reason it won't start.

    My unit is actually an ADH45B2A (no 7).



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Could you check that the bucket is properly installed? It won't work if the microswitch isn't pushed in by the rod or lever which touches the bucket.
If these suggestions do help you solve the problem, please give my reply a rating to help others judge my knowledge / guessing skills.
If they do not, please hold off on the rating and add a comment with more details so I can try to help you further. Cheers, D

Posted on Jul 13, 2008


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If it were mine, I'd take it back where you bought it and complain. They SHOULD give you a replacement that works, and they should PROBABLY demonstrate that the replacement DOES work, right there in the store.

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Whirlpool Basement Dehumidifer is freezing up about l/3 from the bottom. Compressor will not turn off. Coils were cleaned and cleaned fan is running freely. Sitting in well ventilated area and temp...

IIt may very well be that the the air intake filter needs to be removed and cleaned. But, before doing this, turn the unit OFF & unplug it. Allow the unit to completely thaw, before removing the filter.Never operate the unit without the filter in place, As this could damage the unit.

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Display lights up E 1 nothing else happens. What does the E 1 mean? Unit is 4-5 years old.

On models a lttle later than yours E1, indicates that the air intake filter needs to be removed and cleaned. Probably, the same thing as yours. Before doing so, turn the Master ON/OFF Switch to OFF and unplug the unit. If you wash the filter use warm water and dish washing liquid, Rinse thoroughly and allow to completely before reinstalling. DO NOT operate the unit without the air filter in place.

Hope this helps you to troubleshoot and solve the problem.

Jun 26, 2011 | Haier 45-Pint Dehumidifier

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I have a DH305 it turns on but does not draw any water out of the air. I took the back off and noticed that the fan is not moving. should it be?

The fan, generally only operates when the compressor is running and then for a short period there after. A lot of this depends on which humidity extraction level the humidifier is set on. If it's set high (50%+), it's not going to do much extraction at all. However, if it's set on 32-35%, it's really going to run and extract humidity/moisture. In the case of your unit, which has a mechanical control, rather than electronic control , The control knob should be set on Maximum.

In addition, if you haven't checked and or cleaned the air intake filter recently, please do so. A dirty or clogged air filter will affect the operation of the dehumidifier. Also, place of the unit is very improtant. You must maintain a minimum of 12" clear air space around the entire unit. And be sure to keep it away from heat generating appliances.

In you want to do an in home test to see if it's work properly. Do the following:

1. Place the unit in the bathroom, plug it in, turn it ON and set the humidity extraction level at Maximum.

2. Turn the shower on hot enough to generate steam. Close the window(s) in the bathroom and Do Not turn on the exhaust fan As you exit the bathroom close the door.

3. Wait 15 - 20 minutes before returning to the bathroom and opening the door. Turn the shower OFF and allow the dehumidifier to run an additional 10 minutes. Then check the bucket for any signs of water. If you find some, the unit is working as it should. If you don't find any water, the humidity sensor may have failed or the compressor needs to be recharged with refrigerant gas.

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

Jun 16, 2011 | Goldstar DH304 Dehumidifier

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Top of coil is freezing up and unit is not working to pull moisture out. Unit is two years old and coil is clean and filter looks brand new. Should I just throw it in the dumpster or is it worth fixing?

Dan, it may be a case, that the ambient air temperature at floor level is between 40 & 60 Degrees F. This is particularly true in basement applications. Raising it up off the floor onto a sturdy table or counter to, that can handle the weight of the unit, plus a full tank of water, should help.

Also, if there is not enough clear air space around the unit while in operation, it will not work as it should. Maintain a minimum of at least 12" of clear air space around the entire unit.

It would be unusual, but the compressor may be low on R14 Refrigerant Gas. I say unusual, because your dehumidifier is only 2 years old. The more likely cause, would be that the Defrost Sensor has failed, thereby allowing the coil to freeze over.

But, before you throw it in the dumpster (which by the way is illegal, due to the freon gas), Turn the master ON/OFF Switch to OFF. Unplug the unit and allow it to thaw completely, before trying to do anything else to it.You may want to put some old towels under it, to catch any dripping water.

Once the unit has thawed completely and you have reassembled anything you may have removed, Take the unit into the bathroom, turn the shower on hot enough to generate steam. Plug the unit in, turn it on and set the humidity extraction level at 32%. Do not tunr on the bathroom exhaust fan (if you have one) and close any windows in the bathroom. As you exit the bathroom close the door and wait 15 - 20 minutes before returning. Once you do, turn the shower OFF and allow the unit to run an additional 5 minutes. Then check the bucket for signs of water. If you find some, the unit is now working as it should.

If you find no signs of water, the problem lies in what I described above. It can be repaired, but the cost may be almost as high as buying a new unit. Unless, you can do it yourself.

Hope all this helped you. Please let me know. Thanks.

Jun 11, 2011 | LG LHD45EL Dehumidifier

1 Answer

Danby dehumidifier ddr4588ee ices up. Humidifier located in basement with temp around 60degrees. Unit is 1 1/2 years old.

According to your Owners Manual, the coils may start to frost at 60 degrees and the defrost sensor should turn ON and cycle periodically. However, the air temperature at the floor level in a basement, is colder than the air temperature by 5 to 8 degrees. So this may be causing the problem. In addition, if the air intake filter is dirty or clogged, the unit has to strain to keep up and will not function as it should.

If the unit is totally iced up, turn the unit Off and unplug it from the wall outlet. Allow is to thaw completely before attempting to clean the filter. You may want to put some old towels under it while it thaws. Once it's thawed, move it to a bathroom that has a shower. Plug it it in and set the humidity level at 45%. Turn the shower ON at a Medium hot temperature (enough to generate steam) and as you exit the batroom, close the door. DO NOT operate the bathroom's exhaust fan. Allow the unit to operate for 15 to 20 minutes, before returning to the bathroom. Then turn the shower OFF and check the unit for any frost and the amount of water collected in the bucket. If there is no frost on the unit and there's water in the bucket the unit is operating properly.

When you move it back to the basement, place it up off the floor on something sturdy, that can hold the weight and not be bothered by the vibration of the unit, when it's running. (ie a work bench, a counter top, etc.) Operate the unit as you normally do and monitor it for frost or icing up. And, whether or not the defrost sensor is cycling as it should. If you get no frost or just minor frost, it was the air temperature at the floor level, that was causing the problem.

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

May 18, 2011 | Danby DDR4588EE Dehumidifier

1 Answer

Unit turns on for about a few seconds and shuts off. bucket full light stays on. Micro-switch is ok what else could that be

Possibly., the unit turning ON vibrates the bucket in such a way, that it loses contact with the safety switch and the unit shuts OFF. If the dehumidifier is not sitting level, it would cause the bucket to shake more than usual. In addition, if you haven't cleaned the filter recently, I would suggest that you do that. A dirty or clogged filter causes the unit to struggle and if it is to much to handle, it will cause it to shut OFF. Before you attempt remove the filter, turn OFF the Master ON/OFF Switch and Unplug the unit. Be sure you do it in the order I listed.

Hope this helps you further to troubleshoot and solve the problem.

Apr 08, 2011 | Kenmore 54501 Dehumidifier

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Icing up recently.everyday it ices up. the temp. in the basement is about 55 degrees. never had a problem for over a year untill now. it supposed to have an auto-defrost, but it doesnt seem to work.

The air intake filter may be clogged. Cleaning it, may solve the problem, once the unit thaws out. In addition, low refrigerant gas can also cause the unit to ice up. While waiting for the unit to thaw completely, turn the Master On/Off Switch to OFF and unplug the unit. In addition to thawing this unplugged time, may give the unit a chance to reset itself.

Hope this helped you solve the problem.

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The tank may be full. Your dehumidifier has a safety device that turns off the dehumidifier when the water tank is full. Usually the tank itself either presses against a switch or there's a device connected to the tank that triggers a switch when the tank is in place and full.

If you've emptied the tank and the unit doesn't run, inspect the place where the tank rests to see if there's a switch or mechanism that's not being activated. You may be able to turn it on with a simple flick of your finger.

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