Fridge and freezer are getting cold but not cold enough. There is ice building up on the back freezer wall. Fans are working.
It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the back wall of the freezer. If so, you will need to test the defrost heater and the defrost thermostat. They should read closed for continuity when cold. You can test this with a multi-meter TJMA-DMT3. I will include a link at the end to assist you how to use the multi-meter if needed. If both parts are good, you will need to replace the defrost timer. Once the problem is repaired, you will need to thaw out the ice on the coils before the unit will operate properly. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
How do I access this area to replace this part? Is it fairly easy?
Answer Hello Chris. It is not easy to replace the heater WR51X353 in the unit. You will remove the screws securing the inner door liner to the door panel. Then remove the insulation of the dispenser. Then you can access the heater and replace it in the dispenser. When you re-install the gasket and liner, make sure the gasket seals good against the frame of the unit. These are not easy to install, but can be done.