There was a chattering Noise from Adeptive Defrost Assy

I first dropped the Cover Assy, which covers lites and controls, this was done by pulling it forward and it drops down, did not remove top shelf so It was a bit difficult to tilt cover assy. for removal. There is a srew located close to filter assy. in back use nut driver 1/4"located to remove this screw, there are then 2 screws located to the rear and side of light holders, both phillips head, the one on the left side is a bit tricky to remove but I use a thin bladed scredriver, Next there are 2 screws located on both ends od the slides that control temp, both again removed witn1/4 " nut driver, the whole upper assy drops down and forward the Adeptive Defrost assy is located in the back right corner of this assy, unplug the wires and unit snaps out, I foud it easier to pop off top cover of new unit so I could see connector assy when I reattached the wires, then replaced the top assy and snapped new unit it place, Reassymbly was reverse of removal, before placing cover assy back in place I replaced both lamps as 1 was out .