Question about Dehumidifiers

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I forgot to turn off the dehumidifier while away. It froze. I just thawed it tonight, and now it's unplugged and a high pitched hissing sound. No odor from what I can tell, but am concerned

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Its only a guess but I think the refrigerant may be leaking as a result of the freezing. This gas is toxic. Take it to a shop or dealer/specialist.

Posted on Dec 05, 2014


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1 Answer

Fridgidaire Dehumidifier making high pitched noise. What is that?

Good Afternoon Friend,

I understand that you are hearing a high pitched noise coming from your Frigidaire dehumidifier, model# FDF50S, and want to know what it is. There are several possibilities that could be causing this high pitched sound. I suggest contacting either the manufacturer or your local authorized technician for further assistance. The technician will be able to diagnose your dehumidifier and determine exactly what the cause is. Hope this is helpful.

-Best Regards-

May 31, 2014 | Frigidaire FDF50S Dehumidifier

1 Answer

Ice and condensation on top front of dehumidifier

If the unit is new and this is the first time you have operated it, it normal. If that is not the case, turn the unit OFF& unplug it and allow the unit to thaw completely. Once it has thawed, remove the air intake filter to see if it needs cleaning. I suspect that it will. You can vacuum it or if it's really dirty, wash it in warm water and hwashing liquid, thoroughly rinse it and allow it to completely dry, before reinstalling it.

The other thing you should check is the coolant coils. If they are dirty, wipe them off with warm water and wipe dry. Apply a thin coatinf of WD40, after drying them. Reassemble everything and take it for a test drive.

Hope this helped you troubleshoot and solve the problem.

Jul 09, 2011 | LG LHD45EL Dehumidifier

2 Answers

Why is my dehumidifier icing up.

The room temperature is probably too cold, or there's poor airflow
Here's some info that should help you figure out what's causing the problem:

If the evaporator coil is frosting completely and evenly, the most common cause is that the room temperature is too cold. Most dehumidifiers are not meant to be used when the room temperature drops much below 70°F and certainly not below 65°F (depending on humidity). There are however some models called "basement" dehumidifiers which are.

Another possible cause on standard models is poor air flow through the unit. If the fan motor is not turning fast enough (or at all) or the evaporator, condenser or filter (if used) being plugged can also cause this symptom .

May 13, 2011 | Goldstar DH304 Dehumidifier

1 Answer

Will not defrost. Frosts up but not defrost properly.

The air intake filter may need cleaning. If it's dirty or clogged the unit has to strain to keep up. Also, if you're operating it in an area that's below 40 degrees, they have a tendency to frost over.

Turn the Master ON/OFF Control to OFF and unplug the unit. Allow it to thoroughly thaw. After it has thawed, remove the filter and clean it if necessary. It's also a good idea to access the refrigerant coils to wipe and clean them. After they're clean and dry, a light coating of WD40 would be an advantage.
Then, reassemble the humidifier's cabinet, plug it in and turn the Master ON/OFF Switch to ON. Set your humidity level about mid range (45%) and allow the unit to run for at least 1/2 hour before raising or lowering the humidity range.

Routine maintenance is important and will usually solve the problem. I hope that's the case for your dehumidifier.

May 04, 2011 | Whirlpool Dehumidifier 40-Pint

1 Answer

My Frigidaire dehumidifier model FDL70S1has an error code "A5" My coils keep freezing up as well with heavy ice. It has worked fine in the same spot in the basement for two years until last week....

All most all dehumidifiers have a defrost cycle to take care of this problem. However, yours is either not working or the air intake filter is clogged, which makes the unit strain to keep up. Turn the Master ON/OFF Switch to OFF and unplug the unit, before attempting to remove the filter. Allow the unit to thaw while it's unplugged. Once it's completely thawed, plug the unit back in, turn the Master ON/OFF Switch to ON and set your controls as you normally do. Within in an hour or two, you will know if this solved the problem. Also, keep in mind, dehumidifiers are designed only to work in temperatures above 41 degrees. If it's below that where you have the unit, that will cause it to freeze up.

With all that said, what you're seeing as the Error Code is in fact, AS (the 'S' looks a lot like a 5 on the LED screen) It indicates a Sensor Failure. In your case, it's more than likely the Defrost Cycle Sensor. The Owners Manual says "Contact your local Authorized Frigidaire Service Center, if this happens. I'm hoping that cleaning the filter (if needed) and allowing the unit to reset itself (while it's OFF & Unplugged) will solve the problem. But, it may only be a band aide fix.

Hope this helped you.

Apr 28, 2011 | Frigidaire FDL50R1 Dehumidifier

1 Answer

Humidifier gets ice on top of cabinate. It still produces water.

Most dehumidifiers have a defrost cycle that they run through, as needed. But, apparently, your is not functioning. Eventually, yours will stop collecting moisture, if this continues. In the interim, I would suggest turning the Master OnN/OFF Switch to OFF and unplug the unit until it thaws. While it's unplugged, remove and clean the air intake filter on the front of the unit. If it's clogged it causes the unit to strain and may cause it to ice up. Once the filter is clean and the unit is un-thawed. Plug the unit back in and turn the Master ON/OFF Switch to ON and set the controls as you normally do. Hopefully, that period of being unplugged will have allowed the unit to reset itself and work properly.

I have included a link to your Owners Manual that you can download and print for future reference.">http://www.comfort-

If the above link fails go to the following link below and click on Owner Manual, near the top of the page.">

Hope this helps you solve the problem.

Apr 27, 2011 | Comfort-Aire BHD-301 Dehumidifier

1 Answer

Ice on the back screen after it's been running for an hour.

Cleaning the air filter should go a long way in solving the icing problem. Just allow the unit to thaw out completely, before trying to remove the filter. Turn the Master ON/OFF Switch to OFF and unplug the unit from the wall outlet.

Apr 10, 2011 | GE ADER65LN Dehumidifier

1 Answer

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.

Mar 22, 2011 | Danby DDR3009EE Dehumidifier

1 Answer

My lg dehumidifier is collecting ice on top and no water is collecting in waste. Is it dead? this is a new problem but machine is not old

Sounds as if the air filter may be clogged, which causes the coils to freeze. Unplug the unit and allow it to thaw. Once thawed, follow the Owners Manual"s instructions on accessing, removal and cleaning of the air filter. That should solve your problem.

Mar 01, 2011 | LG DH404E Dehumidifier

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