James for Model Number MBF2254HEB The bottom freezer is much warmer than it should be. Replaced the compressor start device, still too warm. Upon further investigation, there was a large ice buildup behind the thermistor but above the coils. Removed all of this buildup, still to warm. what to try next? Bad thermistor? Bad defrost thermostat?
Answer Hello James. It sounds like you may have a defrost problem with the unit. Check and see if there is any frost build up on the evaporator coils in 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 Read More... Answered by AppliancePartsPros.com | Wednesday, April 4, 2018