Question about Maytag M7DH65B2A Dehumidifier

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Icing damage Out Maytag Dehumudifier M7DH65B2A was running with an iced-up coil for about a week while we were away. Basement temp was not much below 65, so this should not have happened. Now it ices-up all the time. Is the unit damaged beyong repair?

Posted by chris castelli on

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Anonymous

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The thermistor is bad. Believe me - I know this too well. Bought 2 of these and both died w/ this same issue right after 1 yr warranty expired. The thermistor is located on bottom-right side of evaporator coil. It has a chrome metal clip that holds it against the evap coil copper tubing. It also has a 2-wire harness that runs out of it up to the front-panel control board. Beware that if you had a big ice-up like this, there is potential damage to the power control board too. It will get a puddle of water under it when the ice thaws and this will cause this circuit board to corrode. If your power control board isn't ruined (power switch works and no other power strangeness like can't turn power on/off unless you pull the cord), you could just order another front panel control board (the one w/ all the LEDs/controls/7-segment displays on it). It comes w/ all the sensors (including the thermistor). It was ~$38 when I purchased it at RepairClinic.com (twice...).

Posted on Oct 01, 2007

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Anonymous

You need to have the r22 charged... As stated above, if its low on r22 then it will ice up... no dehumidifier should ice up.... call a repair guy or better yet, buy another one... good luck.

Posted on Aug 19, 2007

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Related Questions:

0helpful
1answer

THE COIL IS ICING OVER

Hi,

Here is a tip that I wrote that will help you understand why and what you cando with a dehumidifier that ices up.

Dehumidifier is Freezing up and not working

heatman101
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Compressor runs continually and cooling coils ice up but it doesn't defrost.

probally has lost some charge on the refrigerant. Low charge will ice the coil. Unless you are operating this at low temperatures. The ones I have seen do not have a defrost on them
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Does not generate water. The fan keeps on running. Forms ice on coils

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.
1helpful
1answer

Have a wind chaser wdh running in my basement and it keeps icing

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.
2helpful
3answers

The humidifier runs but is not collecting water... so humidity level never drops.

My brand new frigidaire 50 liter dehumidifier has been on for two days and has not collected water from my damp basement. It is on the factory settings: high fan and "CO" (continuous).
1helpful
1answer

Everything sounds like it is running good even the compressor.

First check the coils to see if they are clean. Then check the fan and compressor . They should be running and warm to the touch. If you see ice on one of the coils, there is a good chance some gas has leaked out.If everything looks and feels good, you may have to take it to a repair shop to fix the leak and recharge it. Let the shop tell if it is worth fixing. Don't just throw it away. Be green!
Good Luck!
0helpful
1answer

Maytag m7dh65b2a freezes up ,

Found the instruction book and by reading the setting it allowed the machine to shut off before it freezes up.

Thank you.
0helpful
1answer

Doesnt take any water out

Most dehumidiers have a "Frost Guard" thermal protector on the condensor coil. This protector will turn the compressor off should the temperature fall below 65 degrees in the basement. The condensor fan will still continue to run anticipating the restart of the compressor.
Hence, 3 things could be wrong.
1. air temp.of basement is too cold
2. Frost guard could be faulty
3. Freon leak in condensor coil.
Assuring that basement temp. is above 65 degrees is about all you can do unless you have it checked out by a technician.


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