Drain (part ap2152329) freezes over, no dirt, just clean frozen water from coil defrost. Defrosted water then runs across interior bottom to front and drips to floor. The timer and defrost heater work fine.
Answer Hello Merrill. The drain is clogged. Make sure you blow out the drain line on the unit and run hot water through the drain line and watch it flow. Also, make sure freezer temp is not to cold and is set to 0°. Here is a link to our Repair Forum, this is a free service to our customers. Use this link to access the repair for your question. http://forum.appliancepartspros.com/refrigerator-freezer-repair/173916-kenmore-top-mount-refrig-h2o-build-up.html