After using a hair dryer and plastic tools to gently remove all ice from both compartments, found that the drain line from upper (freezer compartment) was plugged with ice. Examining the pan at bottom of fridge where drain line empties, showed dirt and dust. LIkely the drain had not been working for a long time.
Need suggestions on how to clear the frozen drain line. Access is available at top of line. Would like to minimize amount of time the freezer is emptied so food will not defrost. The drain line itself is inaccessible for most of it's run. (It's between the inner and outer shell of the fridge.
How to speed the 'defrosting' of this drain line segment I cannot reach? thank you for your time.