Coil frozen #1 step should be heater def? Then process of elimination?
Answer Hello Bruce. 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
If you replace to defrost thermostat and defrost timer, and then you put in a new heating element is and you still do not get the heating element to come on is there any other reason for it not to come on? Like a mother board problem?
You will want to make sure that the other defrost bimetal WR50X10068 and WR50X10071 is not bad and that the defrost thermistor if the unit has one is not bad. On the evaporator where the unit bimetal is on the right side there is a second limiter which is on the right side as well and is lower than the one at the top.