The air circulation fan is hitting something (maybe a foam piece). How to get at it? I do not see any screws to remove a cover (seems to be welded). Only screws I see are for the control unit.
There are two screws that hold the rack in that holds the fan assy. Look at the very top of the fan where it connects to the housing. Kinda hard to explain but undo two 5/16 sheet metal screws they are on the top and to the sides, then grap the whole fan and housing and pull towards you. It slides on two rails and will come completely out of the unit and might have to remove some wires to get unit completely out. So make a chart and mark each location very carefully. And don't touch the circuit board with fingers at all. It is very easy once you do it one time you won't believe how easy it comes out. Let me know how it goes ken
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Thanks. Turns out my son had already removed the two screws. It is hard to slide the case off and even then I cannot get at the fan(the one on the room side, behind the cooling coils). But I think I can jam a block of wood over some plastic on the bottom of the fan chamber and this almost stops the fan hitting -- just a slight tic noise now.
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