Kenmore two door top freezer/ bottom fridge. symptoms- water
was dripping from bottom compartment onto the floor. defrost
water had backed up and iced all over back of freezer
compartment. Ice had also formed in bottom of bottom
compartment. (the water had dripped down the inside back
wall). Fridge is about 4 years old.

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.

lee h