Started to tear into why my blower fan works on defrost only today. Removed blower motor housing, brushes looked fine, works with 12volts appliednand when defrost is selected. When pushing buttons for AC on Ccu here clicking noise, aux water pump works. Does this sound like a bad Ccu unit? Is this one that can be rebuilt or resolderd? I see write ups on the board, but this unit looks different. Anything else to check?
Thanks