ICE MELTS TOGETHER IN ICE TRAY BIN,ALSO SEEMS TO POP & CRACK A LOT.MODEL MFD2561HES

Hi I am Kelly, This is my experience and who I am:
http://blog.fixya.com/index.php/2010/05/award-winning-service

I just answered another post your 2 month old question appeared. First let me apologise for such a belated response. Here are my thoughts on your symptoms. Popping and cracking of the evaporator coils is pretty much normal. However... if the freezer door gasket is letting in outside air it can cause excess ice build up on the evaporator. It can also cause the ice in the ice maker drop bin to melt if the door gasket leak is severe enough.
There is another reason for abnormal ice sheeting especially in the ice bin. If the inlet water valve in the back of the unit where the unility water supply connects is bypassing water when it is supposed to be shut off it will over-fill the ice maker and clump the ice in the ice bin. One of the symptoms that you won't notice unless you check it is ice build up in the ice maker rubber fill tube that ports water from the back of the unit to the ice maker. If this tube is not pliable... i.e.. there are sure signs of ice in the tube (more than a couple of drops... then the inlet water valve is bypassing water when it is not supposed to. The only remedy for ths is to replace the inlet water valve.

One way you can prove that the inlet wter valve is bypassing water is to remove the plastic tube that plugs into the rubber fill tube and place that in a baking pan overnight with the ice maker SHUT OFF. If you have water in the baking pan the next morning you know you need a new inlet water vavle.
Your parts are here:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5177000
The inlet water valve is item 10 of the above link.
There is yet another reason for sheeting ice in the ice bin and that would be thermistorfor the defrost heater is not operatng at the proper temps or: due to large amounts of ice has been slowly repositioned to an area that causes it to cycle way late and the freezer compartment is getting well above 32 F during the defrost cycle. FYI the thermitsor is usually positioned above the evaporator coils and cycles at 60 feg F to terminate the automatic defrost cycle. This partiuloar unit has the thermistor in a bracket on the lower RH side of the evaporator coils.
The thermistor is item 30 of this link:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5177000&diagram_id=28599081#d28599081
My intial suspicion is that there is a problem with the inlet water valve. Do the baking pan test I mentioned earlier and check for water the next morning. (Ice maker must be off)

Thanks for choosing FixYa,
Kelly