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DE500P Dehumidifier: Does not dehumidify even though set to dehumidify. Fan will turn on when RH above setting, and stay on, since humidity doesn't drop. Filter is clean & pail empty.

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Locate and touch the cooils located, usually, above the condensate collection pan, ("pail empty"). If the coils are not cold, or cool to the touch, the unit has lost its charge of refrigerant. This would explain why the unit fan is working, but there is no condensate, as there is no coolant (charge) to cool the coils and "pull" the hunidityout of the air.

Posted on Jul 08, 2008

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Delonghi cf208 the dehumidifier mode does not seem to do anything, any suggestions


I have the same model. It works brilliantly as we tend to dry the washing inside this time of year. When on dry mode try turning the "set temp" down to 17'c this normally starts mine off,,, failing that put some washing in a warm room with the dehumidifier "temp set" at 17'c just to test it maybe. or perhaps its just not humid enough where you are placing it? Good luck.

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The room humidity is showing 70 and I have the dehumidifier set for 60 and the water tank doesn't have a drop of water in it. What is the problem?


First set it to its lowest setting, if still nothing, is the coil on the back cold? Its hard to tell if the compressor is running due to the fan noise. If the coil is not cold it will not collect water.

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1 Answer

Water is not filling bucket but is staying in the top of the unit and leaking out


Birdy, I don't think the water you're seeing is from what the dehumidifier has collected. It sounds like the dehumidifier is frozen up. In which case, turn the Master ON/OFF Switch to OFF and unplug the unit, to allow it to thaw for several hours. You may want to put some old towels under it while it thaws.
Once the unit has completely thawed, remove the air intake filter and clean it. Do not reinstall it, until it is completely dry. Also, wipe off any remaining moisture that you see on or under the unit.

Once everything is thawed, cleaned and dried, plug the unit back in and turn the Master ON/OFF Switch to ON. Set the humidity level at 35 to 45% and allow the unit operate as it should. Always remember, there must be at least 2 feet of clear air space around the dehumidifier for it to function properly.

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

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1 Answer

How do I get my LG 12000 BTU ac/dehumidifier to dehumidify


This is a quote from the manufacturer.

Dry mode is used to remove humidity from the room
without additional cooling. Once the set temperature
is reached, the compressor and circulation fan turns
off and only the exhaust fan will run. Fan speed is
pre-set and cannot be adjusted.

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My Dehumidifier has stopped dehumidifying! The fan works and everything else but it no longer collects water. Its is a DESICCANT variant. The air coming out of the vent also used to be warm and this is no...



Hi,


There are many reasons why a dehumidifier will not work or collect water.


Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier

Dehumidifier is running but no water is in bucket

heatman101

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1 Answer

Setting the rh for the fdl2510 dehumidify


Yes, the humidistat will cut the unit off when the humidity reaches the setting.

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I dont know if my new humidifier is working properly


Hello Mary, Where are you located at? if its cold outside? Then whats going on is that even though the outside humidity is say 80 percent humidity on the inside of oyur house even though oyu have the dehumidifier set at say 50 percent by the time the air is heated up there is not that much humidity in it because then the air heats up by the furnance it takes and dries the air out in the process. I know it sounds confusing but if you have ever had a humidifier in you house and it get real cold outside if oyu don't turn the humiditfier down to a lower setting then waht happens is that your windows will start to sweat and run water down to the sill because its condensing on the cold surface of the window. Hope that this helps you.

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1 Answer

We installed a honeywell DH90 whole house dehumidifer #B08167014 4026552. Unit is removing water but the supply side is warm air. We are wondering if this is normal or if this air should be cold.


I assume you mean the exhaust side of the dehumidifier, which goes into the supply duct of the furnace.

All dehumidifiers, whether small portable types, or whole house types, exhaust warm air (which is also dry air) as they remove humidity. The whole house unit which you have is a great solution to humidity control. Since the furnace fan should be running on a call for dehumidification, the mixing of the air in the building which is circulating and the exhaust (Dry) air from the dehumidifier negates, or dissipitates the heat in the air coming from the dehumidifier.

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7 Answers

What is the Dry setting on air conditioner?


Hi, I know this question's been up a while and I'm not sure if you care anymore but here goes anyway.

Most air conditioners are reverse cycle, so they can heat the air in your house or cool it down. What we are concerned with is the cooling side of things. So in this mode a working liquid is sprayed into the evaporator and cools its immediate surroundings. air is blown over the evaporator which cools the air. The local temperature around the evaporator is very cold, (how cold exactly I'm not sure) so the air in this region has a very poor ability to hold water and so (especially on a humid day) water condenses out of this air on the surface of the evaporator, is collected and drained away. The cooling function and dry function both use the "cooling" mechanism of the air conditioner. Both extract water from the air in this way but the primary purpose of the cooling function is to cool the air whereas the primary function of the dry setting is to dry the air... obvious I know.

Now in the dry setting the compressor will run with fan going at I imagine a relatively slow speed to chill and extract as much water from the air as possible and to minimise circulation. After a short time the compressor and fan will cut-out and then after a short interval start up again (I'm not really sure but I assume this is either controlled by a humidity sensor OR the temperature sensor monitors for a small change in temperature and shuts off the compressor and fan when it detects this). Now in cooling mode (depending on what temperature is set) the compressor will run for longer and more frequently and therefore remove more water. So why have a dry mode if cooling mode removes more water?... Well that really has the same answer as the question "when do I use dry mode?"

Well on a particular day where the temperature would normally be considered comfortable but on this day it is unusually humid, your body will find it difficult to radiate heat via sweat because of the already high RH (relative humidity) making you uncomfortable and feel "hot". Using dry mode will reduce this RH without adjusting the temperature by much, but you will perceive an ambient temperature drop due to your body being able to discard heat more easily... hence making you more "comfortable" in same way you would normally feel at that temperature.

On the contrary if you were to use cooling mode (which is regulated by temperature) you would have to set a temperature lower than ambient so that the compressor will "kick-in" rather than the air conditioner just running its fan...agree? So that means the air conditioner will reduce RH (which we want) giving you a perceived temp drop but it is also chasing the temperature which you set which will give a REAL temperature drop. So anyway the point is; if it was an unusually humid day on what would otherwise be a comfortable temperature, using cooling (remember the temp has to be set lower than ambient) instead of dry would result in you feeling cold very quickly due to the perceived AND real temperature drop.

So really the dry setting is for days which aren't too hot, but are humid.

I think my logic makes sense.

cheers Matt

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