Question about Maytag M7DH65B2A Dehumidifier

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Fan not working

I turn it on this spring but air did not blow out. I left it on for 1/2 hour and the humidity was 20 per cent, but no water in storage bin. It is not working right. thank you

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  • jlinster170 May 11, 2010

    the humidity was only 20 % almost impossible is that what it read on the unit it probably needs a new humidistat.



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There are many reasons for a dehumidifierfan not working - 2_bing.gif to not work or collect water.
Here is a tip that I wrote to help people to figure out what is going wrong with their dehumidifier2_bing.gif.

Dehumidifier is running but no water is in bucket


Posted on May 07, 2010


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My HB 40 is not collecting water as aggressively as when it was new. Now several days running only collects 1/2 inch. Is the unit done?

Dehumidifiers don't really have a lot of moving parts. Basically it cools the metal coils and a fan blows air across it.

They can usually be set to a specific range of humidity levels and the fan speeds can usually be adjusted.

If you are wondering if yours if working you need to look at the coils while its running they should be COLD and you should see water condensing on them.

The colder the coils get the better the unit works. If you suspect they are very cold then your unit may not be working very well.

It cost just as much to run a unit that isn't working as it does one that is working.

Do you have a gauge to measure humidity in the house? You really do need to see what the humidity level is before you get a new unit.

The amount of water from a dehumidifier has a much to do with the humidity level in your home as it does the operation of the unit.

The dryer the air is already..... the less water there is to take out when it passes over the coils

Oct 16, 2013 | Dehumidifiers

1 Answer

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

1 Answer

Dehumid. runs and fan blows but no water in tank and never shuts off, 5yr. old maytag, only runs in summer

Several things can cause this problem. The leading one, is that the humidity extraction level is set to high. Lower it to 35%. One of the others, is a dirty or clogged air intake filter. Followed by obstructed air flow. You need to maintain at least a minimum of 12" clear air space around the unit. Also, most humidifiers struggle to operate correctly, if the ambient air temperature at floor level is between 40 to 60 degrees F. This will also cause the fan to run a lot if the unit is set in continuous mode, rather than a timed mode. And finally, if any doors or windows are open, the unit will run forever. Make sure all doors and windows are closed.

Here's an in home test to see if it's working properly. Move the dehumidifier to the bathroom. Plug it in turn it ON and set the humidity/moisture extraction level to 35%. Turn the shower ON hot enough to generate steam. Do Not turn the bathroom exhaust fan ON and close any windows that may be open. As you exit the bathroom, close the door. Wait 15 to 20 minutes before returning to the bathroom. Once you do, turn the shower OFF and allow the unit to run for 5 minutes more. Then check the bucket for any signs of water. If you find some, the unit is working as it should.

If you don't see any signs of water, the unit's compressor may need to be recharged with refrigerant.

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

May 29, 2011 | Maytag M7DH65B2A Dehumidifier

2 Answers

Product is about 6 years old. Used in basement. Worked great until this year. Now will run continuously but collect little water. What type of service do I need? This is a 65 pint per day Whirlpool.

There is some service that you can do ... Clean the filter and the cooling coils, regularly. Check the humidity level that you have the unit set on. It may be set to low and there's just not that much humidity in the air at this time, for it to collect. From what you said, it sounds like you may have it set on continuous cycle which could account for the lack of a lot of water in the bucket. In continuous run, the fan stays ON all the time. It's supposed to do that, so that the air is constantly moving and the sensor only turns the compressor ON, if it senses a humidity level 5% higher than what you have it set for. Try running the unit on a 1 or 2 hour cycle (if your model will do that) rather than continuous cycle.

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

May 18, 2011 | Whirlpool 75-Pint Dehumidifier

1 Answer

Dehumidifier does not see to be collecting water, fan is running but no water from hose

It very well maybe, that you have the humidity removal set to high and it's not sensing any humidity to remove. For example, if you have it set on 65 - 70%, that's not how much humidity it's going to remove. It's the level of humidity it's going to maintain in your home. To remove moisture/humidity, the setting should be low, like 45%. As far as the fan running ... many units are designed that way, in an effort to help keep the air circulating and also to defrost the cools.

If you want to test the unit, to see if it's working properly. Place the dehumidifier in the bathroom and set it at 50%. Turn the shower ON and let it run for 20 minutes with the bathroom door closed and without the exhaust fan running. And check on it after 20 minutes. More than likely, there' will be water in the bucket.

Also, there's routine maintenance that should be performed regularly. Clean the air intake filter, clean and wipe off the the compressor coolant coils, and check for clogs in the drain line of the unit.

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

May 06, 2011 | Amana D545M Dehumidifier

1 Answer

Plug it in turn it on and nothing in the bucket after several hours

Hi, Mindy! The following is an overall review of what causes the problem you listed.

If the room air is less than the set air, then there is no water in the bucket, because there is almost no humidity in the air. If it is winter, there is likely not enough humidity in the air to have water collect in the bucket. A dehumidifier will only pick up humidity out of warm air. If you are running a dehumidifier in your basement in the winter, the room may be damp, but too cold for the dehumidifier to pull out the humidity. Try running the unit in the bathroom after having a hot shower without the bathroom fan on. If working correctly the unit should draw water. In addition, if you set the humidity level you want to maintain higher the actual humidity level in the house or room, it won't pickup and collect any moisture. The fans on most of the dehumidifiers on the market today run almost constantly. They do this, so that the room air is always moving and if humidity is detected, it will extract it.

Hope this helps you understand how dehumidifiers function and what you can expect from them under given circumstances,. In fact, there may not be anything mechanically wrong with yours. But, to make sure, do what is suggested above to test the unit.

Apr 29, 2011 | Haier Dehumidifiers

1 Answer

Dehumidifier doesn't draw in water (humidity).

It may be too cool in the basement for it to work. Mine doesn't work if its 67 or below. Take it upstairs and see if it works there, where it is warmer.

Apr 06, 2010 | Frigidaire FDF50S Dehumidifier

1 Answer

It turns on and the filter is clean but it doesn't remove the humidity from our basement. No water accumulates in the pan after hours of running.

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

Is the fan blowing out air? If not
It made no sense to me that despite no visual issues, the fan motor is bad. So, with further research it turns out that the true culprit is the small thermistor/thermal fuse between the orange wire (ground) and motor winding wire. The thermistor is taped underneath the silver aluminium and yellow tape on the fan motor. I heard about this bad (open/no continuity) thermistor makes almost >99% of the fan motor problem regardless of any brand name because this cheap c-fram fan motor is NOT made in USA. I opened the motor, there is a silver (aluminum wrap) around the windings for the motor that needs to be cut. Careful not to cut the motor windings. Inside there is a thermistor or type of temperature sensor connected between the orange wire and a motor winding wire. On my motor this was no longer working.
The part marked "JET 123 NM1 2A 130C" is a thermal fuse. The 130C is the temperature rating. When the motor get hot (130C / 265F) the fuse opens. The circuit is broken and the motor stops.

The motor is still good. The fuse is blown. It must be replaced to get the motor running again. You could bypass the fuse but then you invite a fire hazard.

A replacement fuse is available from Digi-Key. It is a Cantherm SDJ1 DF128S (128C):

Part cost 98 cents

You might want to go with the next higher temp (141C):

Dec 16, 2009 | Haier HD306 Dehumidifier

4 Answers

Goldstar dehumidifier won't stay on

Check the relative humidity in the room or space where you are operating the dehumidifier. Damp feeling and actual humidity level are two separated items. Humidifiers will run for a few minutes until it is signaled that the humidity is already low enough and then shut down.

Oct 27, 2007 | Goldstar DH504EL Dehumidifier

1 Answer


The Efficiency Factor (EF) is a guide to a dehumidifier's operating cost. The EF is the amount of water, in litres, a dehumidifier removes at 27°C (80.6°F) and 60 per cent relative humidity for each kilowatt hour (kWh) of electricity. If electricity costs 8 cents a kilowatt hour, which it does in many parts of Canada, a unit with an EF of 1.2 will remove 15 L (32 U.S. pints or 3.3 imperial gal.) foreach dollar in electricity costs. An advanced unit with an EF of 2.4 will remove 30 L (63 U.S. pints, 6 1/2 imperial gal.) of water for each electrical dollar spent. Because condensation gives off heat a dehumidifier acts as a heat source. This can be useful in spring or fall, when basements tend to be cool. In mid-summer, the heat added by a dehumidifier is counterproductive.

Sep 07, 2007 | Danby DDR583R Dehumidifier

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