OK guys,per your advice from a previous post of mine I jumpered the mother board between line and def and the defrost heater got hot immediately. So I am going to replace the motherboard. While at it I am going to go ahead and replace the def heater as the present one looks a little ragged and from reading of the frequency of failure.I think I might as well also replace the thermostat while in there. (all parts purchased from this site of course). Is there anything else I should do in your opinion?
No I would say you have it covered.
Note that you will get a dual heater kit for the unit which is touted as being more reliable than the single element type.
Also might not be a bad idea to check/clean your condenser coils and fan blade.

PS....The ice maker makes ice good but when using the dispenser from the door the little flapper spring is to tight and wont allow the ice to fall....any suggestions here?
Looks like woodchuckie answered this.