how do i fix my fridge thats leaking from the bottom?

Perhaps the drainage hole is blocked?
If you pull the fridge away from the wall and look at the back, you should see under the cooling plate a drainage hole which should allow water to drain into a tray over the compressor, from where it is supposed to evaporate.
If the drainage hole is blocked, water will escape from the fridge to the floor.
Use a piece of wire to unblock the drainage hole.

Raaid
July 2012