Hi Mark
Check the cables, you will find some loose joints. The light frame/ assembly should be firm, if any part is moving or not sitting in its place, get that corrected. You don't need a rocket scientist to diagnose your problem.
ok 0 cel. is 32 f - 6 cel is cold as hell frozen over so its cold enough LOL I would ask who ever replaced thermostat why the icemaker stopped working did they turn of water to it when they worked on it?