Answer Hello Jerry. It is in the freezer under the evaporator coils on the unit. 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 Read More... Answered by AppliancePartsPros.com | Monday, September 23, 2013