Question about Maytag M7DH45B2A Dehumidifier

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Full light comes on early

My dehumidifier's "full light" comes on and shuts it down when the tank is less than a quarter full. I cleaned the filter really well and it worked well only twice before it started doing it again

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Most dehumidifiers rely on a float sitting in the pail to rise, turning off the switch. Check and see if the float moves clean and smooth, and is sitting in the pail rather than resting on it's brim.

There may be other safety switches, like a temperature sensor to turn it off if it runs the risk of freezing up or overheating.

Posted on Sep 18, 2008

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Posted on Jan 02, 2017

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1 Answer

Does not shut off when tank full, water leaks all over the floor if I don't watch it constantly


Sounds like the float valve inside tank may be stuck in closed position. Calcium buildup is very common. Good luck Juliana. Unplug and empty tank of any water and look for the float valve it should be near top of tank. Use a small bucket and mix vinegar and water and brush. Scrub that valve. Clean it up

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Full light stays on always


Don't know your model specifically, but most dehumidifiers have a float that shuts the system down when the tank is full. Maybe the float is not going up and down like it should. With the power off and the tank out, see if the float is descending like it should when the tank is out. Popping it up and down a few times might solve the problem.

Apr 13, 2014 | Comfort-Aire Dehumidifiers

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Red exclamation sign blinking


Dehumidifier? Sounds like a warning of some sort. A humidifier does a simple job, removing moisture from the air. If yours is not set up to drain, it could have a full holding tank. Empty it out and give it a rinse and it should be good. Drop a couple drops of chlorine bleach in it to keep down the mold growth.

If it isn't a full tank, it could be an air filter that needs cleaning or replacing. Often these things are programmed in and needs to be cleared. Clean and or replace any and all air filters and look for a reset button.

Good luck.

Mar 15, 2014 | Dehumidifiers

1 Answer

I have a delongji DEM 10 dehumidifier and it keeps switching to pause, I have cleaned filter switched off for a while but it still won't come on


follow this steps and fix it. God bless you

Unless you are licensed and qualified professional, do not try to repair a dehumidifier by yourself. If your unit is running constantly yet there is no water in the tank, try lowering the temperature control. If the problem persists, there may be a problem within the refrigeration system. You may need to pull the filter and clean it. Also try wiping off the unit itself. When the water tank is full, the unit will shut off and will not run until the tank is emptied. The dehumidifier shuts off by a safety switch in the back of the unit. If the switch is not working properly, you may try manually pressing the button or slightly bending the switch.
    Motor If the fan motor is damaged or will not work, no cool air will be coming out of the dehumidifier. The unit, however, may still run. You may need to replace the motor. If the coils in the back of the dehumidifier constantly freeze, try turning off the unit for an hour or re-locating the unit to a higher position to allow the room to heat up. If your water tank is constantly full and you are emptying it on a daily basis, you may have a water leak somewhere in the room with the dehumidifier.

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    Where is the float


    Don't know your model specifically, but the float is usually at the top of your water tank and activates the system to shut down by popping up when the tank is full. With some tanks you can actually reach in and sort of clean off the float. Jelly-like stuff can build up on the float after a number of years. Cleaning it off wouldn't hurt.

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    1 Answer

    Unit will turn on for less than a minute and then shut itself completely off. It is not the switch for the bucket and the filter is clean. Any ideas on what can be causing the problem?


    More than likely. the humidity extraction level is set to high. Lower it to 32 - 35%. If the unit is being used in a basement application, to air temp at floor level may be to cold. Setting the unit up off the floor on to a sturdy table or cabinet top, that is sturdy enough to handle the weight of the unit, plus a full tank of water will help.

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    If the unit is titled forward at all, the "full bucket" "trip switch" will not trigger off as it should. Be sure the unit is on a flat, level surface, or leaning backward slightly--this also aids drainage through the drain tube, if that's your set-up.

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    Check the point on the tank (Bucket) where the hose connects to. Make sure there is no obstruction at the outlet of the bucket to the hose connection. Next make sure the hose has no kinks or no loops that may trap air to the drain. If necessary for a long run to the place of drainage raise the dehumidifier to a higher level for better drainage.

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    Fedders Dehumidifier


    ALL DEHUMIDIFIERS REQUIRE ROOM TEMPS TO BE AT LEAST 65 DEGREES AND A HUMIDITY OF AT LEAST 50 % TO OPERATE PROPERLY. ANYTHING LESS AND IT MAY FREEZE THE EVAPORATOR COILS. EVAPORATOR COILS WILL ALSO FREEZE IF THE COILS ARE DIRTY AND HAVE RESTRICTED AIR FLOW.TRY TAKING THE COVER OFF OF THE UNIT AND CLEANING BOTH SETS OF COILS INSIDE. THEY ARE COPPER OR ALUMINUM WITH FINS ON THEM.
    ALSO CHECK THE FAN TO BE SURE IT IS RUNNING.
    THAT WILL CAUSE AN OVERHEATING CONDITION AND WILL SHUT DOWN THE COMPRESSOR ALSO.

    Jan 13, 2008 | Dehumidifiers

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