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Well Rebek95 If you think you can work with me and know how to do some things with diagnostics or know someone that can help you, I will be able to help you. First I would like you to double check your model number as I am un able to locate a GSH22SXA
However I do show these model numbers GSH22SGPASS GSH22SGPBSS GSH22SGPCSS GSH22SGPDSS GSH22SGRBSS GSH22SGRESS
Let me know what you find because answering your question correctly depends on the correct model, Thanks Sea Breeze
has burned out. Unplug and remove the rear panel inside the freezer. Defrost with a hair dryer
and examine the defrost heater and look to see if burned out, It has a glass tube around the heater element and will be easy to see if burned out. If you need to replace the defrost heater you should also replace the defrost thermostat part number WR50X10054 If you don't see a problem with the defrost heater and I will instruct you on how to manually defrost to test the heater and defrost thermostat. Check for bad connections on wiring to heater and defrost thermostat. Your model has a mother control board part number WR55X10942 We may also need to check that because it does the thinking and determines the time for defrost. Let me Know what you find, Thanks, Sea Breeze 
