Question about Fedders A7DH45B2A Dehumidifier

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Humidifier is freezing up

Our M7DH45B2A humidifier is now freezing up. We purchased it 14 mos. ago and it has worked FINE. Now it freezes up and it's frustrating. The room temp is the same in our basement as it always has been. 66 degrees. I was told that some models will not work properly in temps. less that 65 degrees. But the room temp here HAS NOT changed since we first used the Dehumidifier.

Posted by steck on

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  • Anonymous Jun 04, 2008

    I have the same freeze-up problem...I assume it must be a small leak or all the coolant would be lost. Is this a problem that can be fixed by trying to patch the leak?


  • Anonymous Jun 27, 2008

    I have the same dehumidifier and it does the same thing. but I was able to fix mine. It was not low on refridgerant. There is a temp. sensor clamped to the evaporater coil with a thin metal clip. The clip rusted out and the sensor fell out of position. I used a small stainless steel hose clamp and clamped the sensor back into position. It now works fine

  • Anonymous Nov 11, 2008

    Daveschevy2 hit the nail on the head. I had the exact same freezing up problem. I opened up the case and found the temperature sensor rusted and just hanging by its wire. I used my Dremel tool to clean the rust then I used a piece of wire to tie it back onto the coil in the correct position. Thank you for the fix.

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I have the same dehumidifier and it does the same thing. but I was able to fix mine. It was not low on refridgerant. There is a temp. sensor clamped to the evaporater coil with a thin metal clip. The clip rusted out and the sensor fell out of position. I used a small stainless steel hose clamp and clamped the sensor back into position. It now works fine

Posted on Jun 27, 2008

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You have a sealed system leak, some have a 1 year sealed system warranty some have a 5 year warranty parts only labor is only 1 year

Posted on Apr 10, 2008

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