Hi,
I found two... ARB2217CSL-PARB2217CS0 ARB2217CSL-PARB2217CS2
Certainly -sounds- like a restricted defrost drain.
The defrost drain starts behind the back wall inside the freezer...under the cooling coils...drips onto a trough there and goes through the floor and down a tube/hose and into a pan under the refrigerator. A wire or cable can often be used to run through the hose to clean it out, or even a turley baster filled with hot water can be used to blast some water down the drain to help flush it out.
These may help....