Simon E for Model Number tfx20jrbkww I have ge side by side refridgerater freezer ice building up inside back wall.
Answer Hello Simon, You will want to check continuity of the defrost heater and defrost thermostat. If either of these parts do not have continuity then they would need to be replaced. If both check ok then you would need to replace the defrost timer. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html Read More... Answered by AppliancePartsPros.com | Monday, December 24, 2012