Water was pooling in the bottom of refrigerator. I first pulled out the refrigerator and accessed the rear. I ran long plastic tie through the plastic drain line from the funnel to the evaporation pan and cleared a clog (assumed was deposits of rust from drain pan). I siphoned out all water with a turkey baster then used compressed air to blow out remainder from the line into the refrigerator. To replace the drip pan from below the evaporator coils inside the refrigerator side,remove bottom three drawers and shelves. Loosen screws and remove plastic cover from water line on right side. Remove plastic cover and foam from coil. Remove screws holding coil and drain pan to back of unit. Gently pull coil forward while working drain pan out from below coil. (I put several coats of Cold Galvanizing Paint on new pan and let cure for several days prior to installation.) Work new pan in place by gently pulling coil forward. Work pan drain tube into funnel. Install all screws and components removed in reverse order. Job took about 30 minutes. Old pan was rusted through around drain tube. Remainder of pan was badly rusted and close to penetration.