Question about Maytag M7DH45B2A Dehumidifier

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FAN AND COMPRESSOR START. HUMIDITY SET AT 30, ALWAYS RUNS. NO WATER IS CONDENSED. PAIL STAYS EMPTY. CLEANED FRONT AND BACK OF COILS, REALLY ONLY FINS,CAN'T GET TO COILS WITHOUT HAVING TO DO A MAJOR DISASSEMBLE. THANK YOU

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Rather than have you disassemble the cabinet to get to the coils, I want you to do an "At Home Test".

Move the dehumidifier to a bathroom that has a shower. Plug it in, Turn it ON and set the humidity level at 30%. Turn the shower on to medium hot (enough to generate some steam. Do Not turn On the bathroom exhaust fan. As you leave the bathroom close the door. Wait 15 minutes and return to the bathroom. Turn the shower OFF and inspect the unit's water collection bucket for water. If you find any, the unit is working as it should. If you don't find any water, it may be that the humidity sensor has failed or the air intake filter is clogged. In which case, remove the filter and clean it. If it's the sensor, unless you are really DIY savy, I'd recommend buying a new dehumidifier. As finding the part (your unit was made by Fedders), the cost of the part and the labor involved, to me, out ways repairing it.

Now, on the positive side ... If you saw water in the bucket after the bathroom test. It may simply be, that at this time, there is not enough humidity in the room air (even at 30%) to trigger the sensor. If the unit is in a basement, the air temp (60 degrees or lower) will affect it. As the temperature at floor level (where the unit is) is 5 to 8 degrees colder than the air temperature. Dehumidifiers don't work well in cold temperatures.

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

Posted on May 18, 2011

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Components Residential dehumidifiers have a cooling system made up of these primary components:

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