Orange glow coming from inside freezer back of freezer warm

HI. that glow will be the defrost element. If that element continues to glow for a long period of time, longer than an hour, this will indicate that there are issues that concern the integrity of the defrost timer, or adaptive defrost control board. I would advise to shut off the power to the unit for five minutes. this will rest all the control boards that exist in the units structure. re-introduce the power to the unit, after the five minutes are up. If the element continues to glow, continuously, this will confirm that the defrost module has failed.(stuck in the defrost position). replace the either the defrost timer, or adaptive defrost control board(depending on the model), if the reset did not correct the issue.

The orange glow is normal as is the heating of the rear panel . Your refrig is in the defrost cycle . Stays in defrost for 28-32 min , although the heater will cut off before that time , due to the defrost thermostat . This should happen every 8 , 10 , or 12 hrs , depending on the model of the refrig .

I purchased another refrigerator defrost heater in the mail and when I plugged it in later in the day it smelt like burnt wires and was glowing