Question about Maytag M7DH45B2A Dehumidifier

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Mades noise and it appears not to remove any water

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Hi,
There are many reasons why a dehumidifier willnot work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrongwith their dehumidifier

Dehumidifier is running but no water is in bucket

heatman101

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Posted on May 27, 2011

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Posted on Jan 02, 2017

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GE dehumidifer fan making loud knocking noise


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Dehumidifier makes noise


the "noise" you hear is most likely the rattle of the evaporator coils as that's where the "old fridge" sounds come from , i'll bet there was little rubber shock insulator collars around the coils of tubes in there holding them still , but now the rubber is hard and cracked allowing the coils to hit one another producing the noise you hear , Rubber bands could be used as a substitute but would sucome to the same folly eventually over time and break requiring you too reapply new ones

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Just purchases a kenmore dehumidifier and appears to work, but the bucket is completely dry.


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Feb 13, 2014 | Kenmore Dehumidifiers

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Our dehumidifier is making a loud noise, it is working but so annoyingly loud that we cannot use it in our finished basement.


The most common source of noise is the handle on the water bucket. I'd just remove the handle.

Jan 15, 2011 | LG LD40E Dehumidifier

1 Answer

Unit seemed to be emitting hot air. Ran it continuously but did not accumulate much water as in prior years. Yesterday, motor made a very loud noise and sounded like it was going to explode. I, of...


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The compressor basically blew up inside...not worth fixing... chuck it and buy a new one...


There can be 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
http://www.fixya.com/support/r4662409-dehumidifier_running_but_no_water_in

heatman101

Sep 01, 2010 | Maytag M7DH65B2A Dehumidifier

1 Answer

Ebac 2850 made rumbling noises and shook now not working at all


If the room tempature is close to 60, the coils may be frozen (completely encased in ice). If this is the case, move it where the water can drain off - about 1 gallon which may NOT run into the drain bucket.
I out mine over the floor drain.
Turn off and it will defost over night.
Only specially made dehumidifers work below a room temo of 60 degrees (the temp of a basement in winter).
Does it need to be running? A digital humidity sensot from Radio Shack is cheap and may tell you the humidity is OK - only 50% or less.

Jan 01, 2010 | Ebac Dehumidifiers

1 Answer

I have an ebac dehumidifier i think 6000 model and it appears to work fine. the fan runs ok the compressor seems to kick in ok but the tank will not fill. i had it on in my room for approx 30 mins and...


If the room temperature is close to 60, the coils may be frozen (completely encased in ice). If this is the case, move it where the water can drain off - about 1 gallon which may NOT run into the drain bucket.
I out mine over the floor drain.
Turn off and it will defrost over night.
Only specially made dehumidifiers work below a room temp of 60 degrees (the temp of a basement in winter).
Does it need to be running? A digital humidity sensor from Radio Shack is cheap and may tell you the humidity is OK - only 50% or less.

Dec 19, 2009 | Ebac HD880 Dehumidifier

1 Answer

How to clean filter


The de-humidifier is a niche product. Its only job is to remove moisture from air to alleviate the problems of mould and mildew. It is very similar in operation to a window air conditioner.

A dehumidifier though will add heat to the room, while an air conditioner will remove heat.

The de-humidifier is an appliance that requires regular maintenance. This may be because it’s icing up, overflowing, not removing enough moisture, or simply time for a good cleaning to maintain its efficiency. If you don’t feel handy enough to attempt this project contact your appliance repairperson.

The following is a step-by-step method used to return your de-humidifiers to its peak efficiency.

Tools required

1 Multi pocket container (old ice cube tray)

2 Long handled brush

3 Oil can

4 Rags

5 De-greaser or spray detergent

6 Selection of screwdrivers

7 New filter


1… Remove water collection bucket and put aside.

2… Remove the filter from rear of machine. Filer is usually within a frame and simply pops out. If no filter proceed to next step. If it is a disposable filter simply replace it with a new one. Other types are made in a plastic frame and can be cleaned and reused. To clean a filter lay it flat in the sink and sprinkle surface with powder laundry detergent. Plug sink drain and turn on hot water. Cover filter with enough water to submerge. Soak for 15 minutes. Remove from water and rinse. Hang up to dry while proceeding to next step.

3… Remove the rear grille from the main body of de-humidifier. If none proceed to next step. If there is resistance then look for hidden screws. If grille locks into cover proceed to next step. Once removed place the grille aside until later.

Tip: Dehumidifier may use different types and sizes of screws. Use ice cube tray to segregate.

4… Remove metal cover of de-humidifier to access inner workings. Cover screws may be difficult to see because are often painted to match body color. Usually two or three screws along each side of base. Once screws are removed lift the cover straight up. Use extreme caution at this point. Front grille may be secured to cover. Some fronts are put together like a puzzle. Parts often interconnect or are screwed to one another. If front grille lifts off with cover try to separate before proceeding. Front grille may lock into groove along front edge of cover. Avoid pulling off any wires from humidistat or indicator light.

5… When cover removed this will expose the heating and cooling coil. They may appear as one but are actually two separate coils in very close proximity. Both will need to be cleaned.

Use a narrow brush to remove surface dust and dirt from the front and rear surfaces of coils. Use an up and down motion to avoid bending fins. Area between two coils must also be cleaned. Use caution, the fins are soft aluminum and can be easily damaged. Once surface dirt is removed, spray with de-greaser or light cleaner. There is a good product on the market called HVAC cleaner. As the name implies it is meant for Heating, Ventilation, and Air Conditioner coil cleaning. If this is not available Fantastic Spray cleaner used in kitchens and bathrooms works quite well. Remove dirt and excess cleaner by slowly pouring warm water into fins. Do not allow the water to enter any electrical connections or components. As an added precaution cover the motor with one of the cloth rags to protect it from the water.

6… With cover, rear grille, and front grilles removed locate fan motor for oil holes. Add a few drops of oil to each end of the motor body. Use a general purpose (3in1) oil or clean motor oil. A #30 oil is sufficient. Three or four drops on both ends of the motor body are sufficient. Add the oil slowly, pausing a few seconds between each drop. If added too quickly over-lubrication will result.

7… Straighten any bent fins. Use a fin comb if available. If no fin comb then use something soft such as a Popsicle stick. Straightening the fins will increase the efficiency of the airflow through the coils. Use caution as these coils are filled with high-pressure refrigerant.

8… Wipe any dirt from fan blade using a soft rag. Do not bend blades. This would cause a vibration that would harm the motor.

9… Vacuum all surfaces including front and back of grille assembly. Vacuum underside of metal cover. Vacuum dirt buildup from base and any other exposed surfaces.

10… Drain any water left in the base and allow it to dry.

11… When completely dry plug in and test operation. On some models testing may require temporary override of bucket overflow switch. Test that cooling coil begins to sweat water within few minutes of operation. If everything appears okay unplug and reassemble. Insert water collection bucket slowly to avoid damaging float switch mechanism.

Jul 17, 2009 | Dehumidifiers

1 Answer

Dehumidifier only two years old now doesn't extract water from air since I just started it up again for the summer.


Problem is that you bought a dehumidifier made by the Korean/Chinese manufacturer LG.
Search the web and you will find that you are just one of many whose dehumidifier worked the first year but now draws no water out of the air even though it makes all the right fan and compressor noises.
Most common problem is that all the Freon refrigerant escaped, apparently because the copper tubing cracked and leaked. Penguins beware, there goes the Ozone Hole!
It cost me $14 and an afternoon of investigation and testing of my LG 504EL dehumidifier to figure this out. The fix-it web site "Just Answers" said that it wasn't worth fixing after I described all the symptoms. Tomorrow I will go to the local LG fix-it shop and try to get a replacement to tide me over until I can find a reliable dehumidifier.
Sadly, last Fall I took my 25 year old Westinghouse (made in America) dehumidifier to the dump. Even though it needed me to tune it up every year or two, at least I could fix it and it kept on working for 25 years.
Good luck!
enterich

Jun 28, 2009 | Whirlpool AD50DSL Dehumidifier

2 Answers

Fan runs, no water collected


It appears that these units have a history of defectiveness. I bought one in late 2010 and it pooped early 2012. If the model is still made, buy a new one, return the defective one in the new unit's packing materials for a refund. Or keep the second (new) unit as a back-up, because the new (first) one may just fail again a short while later.

Oct 05, 2008 | Soleus CFM-40 Dehumidifier

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