water leaking on floor

Hi all
Got this fridge new over ten tears ago
Is in great shape,but lately started leaking water on floor.
I found drain block connected to hose feeding water to evap pan plugged.
Can not find info on removing block as it is behind cooling coil that runs all way up back.Do not want to do this blind and maybe break coil.Any info on model comes up as whirlpool range,no more info on schematic on inside of frdge
Help or advice please
have great day
Don (the old guy)

Al ok Removed two screws holding drain to fridge with long square blade screw driver .Removed 2 screws holding coil to fridge twisted and removed whole thing (plugged solid ) Replace with latex sealent cleaned and defrosted evaporator and freezer coils replaced panels all working fine now for 5 days
Thank you for at least looking at my post Have great day all