Question about Whirlpool AD70USS Dehumidifier

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We get no water in the reservoir no matter how long it runs. Can this be self-repaired? Will it require recharging coolant?

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You may be able to repair it..
may or may not be refrigerant related...
Here is a tip that I wrote about that problem...


Posted on May 02, 2010


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Have a dehumidifier, Delonghi DE500P. Unit operates but no water collecting in bucket.Level set to 35%. Can freon be added to recharge?

the short answer is yes , but id caution you on the need too first?

first check the basics:
bucket full lite not on (blinking)
filters clean ?
both fan and compressor inside running (sometimes the fan runs but the compressor does not?) listen carefull for them both?
if your unit needs recharged odds are it's not financial feasible to do so , first you have to fix cause of gas leaking out ? what ever that is ? then you need to add service ports and finally you need a gas charge , this would or could cost hundreds of dollars , a entire new unit is less 200 bucks unless you do all this work your self , but id tend to think if you had all the tools and knowledge to do that youd not of asked here in the first place

Jul 21, 2015 | Dehumidifiers

2 Answers

How to change coolant in dehumidifier

Improve the FixYa experience for everyone by voting. I want you to let me know if the solution(s) suggested were of any value. Constructive criticism is welcomed.


Since you didn't provide a model, the suggestions are not model specific. So bear with me since I have no idea of your tech level and will have to include a lot of detail.

I have no personal interest or association with any product that I may suggest.

How to Recharge a Dehumidifier

Do you need to recharge your dehumidifier? Here's what you need to know.

Dehumidifiers use cooling coils, similar to air conditioners. Those cooling coils use refrigerants, the same as air conditioners do.

If your dehumidifier stops removing moisture from the air but the motor and fan seem to be working fine, your dehumidifier may need to be recharged.

Let's repeat that a different way.

  • Is your dehumidifier's motor running?
  • Is the fan also working?
  • Is your air still too damp?

If so, you may need to recharge your dehumidifier.

That's where this gets interesting.

Legal, illegal and obsolete coolants

Older dehumidifiers use a coolant called R-22. That's being phased out and its use is strictly regulated, around the world.

In the old days, you could by an air conditioner recharging kit. Hook the hoses to the air conditioner or dehumidifier (or refrigerator) and follow the instructions. Easy!

Today, your dehumidifier may still use R-22. If so, due to strict environmental regulations, you'll need to check with an air conditioner repair service.

They may be able to help you, but they may not. It depends on whether they have any R-22, and whether they're authorized to recharge dehumidifiers with it. (Yes, they need a permit for this. Be sure they have one.)

Check your dehumidifier

A panel or sticker on it may tell you which coolant your dehumidifier uses. Or, the manufacturer's date may give you an idea. If the dehumidifier was made before 1995, it's likely to require R-22.

If you own a newer dehumidifier, it may use a more environmentally-friendly coolant. (If you bought your dehumidifier after January 2010, it's almost certain to use something other than R-22.)

New dehumidifiers usually run on R-410A. That's often called Puron.

Puron is one of the best alternatives to R-22. It's inexpensive. So far, it has fewer problems that some other "green" coolants. Puron still causes some ozone problems, because it's methane base. However, it's better than anything else you can buy now.

Puron (or R-410A) runs at a much higher pressure than R-22 did.


You can't just replace your R-22 coolant with R-410A. The valves and gaskets may not hold, and - if your coolant leaks out - you're back to square one.

Generally, it's safer and cheaper to replace your dehumidifier with a new one that's already set up to use R-410A (Puron).

Frigidaire 70-Pint Dehumidifier.
I recommend only one dehumidifier, no matter what your needs. It can handle damp basements. It runs economically. You can set the humidity level you want, and it'll turn itself off when it reaches that level... no wasted electricity!

It's also one of the quietest dehumidifiers and it has top ratings and customer reviews at Amazon. (It's regularly on Amazon's "best sellers" list.)

May 22, 2012 | Whirlpool Dehumidifiers

1 Answer

No water in the catcher

its probably low on refrigerant if its a newer model it will be R134a refrigerant,if older R-22 freon,the newer ones like to lose their charge,dependent upon what you initially paid for the unit will govern whether to repair or junk,usually between $50-$75 to top off more to repair and recharge

May 11, 2012 | Dehumidifiers

1 Answer

How do I have the compressor recharged?

the unit does not require 'recharging' unless you've had a refrigerant leak - in which case you will need a qualified AC TECH to recharge it for you, after, he/she has found and repaired the leak.
But, as I said above, without a leak in the system you do not need to recharge it.

Aug 04, 2011 | Maytag M7DH45B2A Dehumidifier

1 Answer

My machine is running but no water is being collected. The model number on my machine says DE N 500 P

Several things can cause your problem:

Dirty or clogged air intake filter. Remove and clean the filter according to the Owner's Manual instructions.

Dirty coolant coils. Clean and dry the coolant coils.

The humidity extraction level is set to high. Lower the level to 35%

Not enough free air space around the unit. Maintain at least 12" of air space around the entire unit.

The ambient air temperature at floor level is to cold (between 40 - 60 degrees F). Raise the unit up off the floor onto something sturdy enough to handle the weight (including a full tank of water) and the vibration during operation. This happens frequently in basement applications.

Depending on the age of the unit, the refrigeration coolant may need to be recharged.

The humidity sensor has failed and needs to be replaced.

All of the above are where you start troubleshooting and hopefully solving the problem.

Jun 01, 2011 | DeLonghi DE500 Dehumidifier

1 Answer

My dehumiderfier runs all day but never has any water in the bucket, what can I do?

It is likely that the unit has lost it's refrigerant charge. IT can be recharged but will require a servicing fitting be braised into the system and also finding where the leak is. It is likely that the repair will exceed the cost of a replacement.

Apr 19, 2011 | Whirlpool Dehumidifiers

2 Answers

My DeLonghi Portable Dehumidifier Model DEM10 has stopped working. It doesn't make the same noise when you turn it on anymore i.e the slight refridgerator sound. Does this sound like a repairable problem...


First, make sure the reservoir is empty. If you plug the unit in and see a green power light, but the unit won't run, make sure the reservoir is properly inserted. Many dehumidifiers have switches or sensors to make sure that the reservoir is placed so that it won't leak. Look for these sensors and make sure the reservoir is engaging them. If your dehumidifier has a float or switch to indicate a full reservoir, make sure this switch isn't being tripped accidentally.

Good luck.

Aug 13, 2010 | DeLonghi Dehumidifiers

1 Answer

Just replaced fan motor,and blade works fine,been running for 4 days,but no water collected,in container home homedry 660

These are somewhat related to cooling systems so the system may need a coolant recharge like any AC. Check your user guide to see if there is any mention of a need for recharging.

Oct 04, 2009 | Ebac HD880 Dehumidifier

1 Answer

Our Surround Air Automatic Dehumidifier, Model TWD-21B, Serial 21B03260311 does not pull humidity out of the air anymore. The fan runs and cycles normally, but no water ends up in the reservoir. Any ideas?...

yes, the unit uses refrigerant, depending on the type unit maybe cost prohib to repair. You would need to check and make sure compressor is running. If there are no service ports then you would need to install service ports. we use piercing valves and then manifold gauges

Aug 09, 2009 | Dehumidifiers

1 Answer


if the compressor is running and the fan is running then the unit has a sealed system leak that will need to be repaired and recharged to function properly

Jun 03, 2008 | Kenmore 5230 Dehumidifier

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