Is there a cause for this issue? Any service bulletin or repair kit? Or do i need to replace the evaporator cover assembly? Can a sealed system failure cause this?
I would start by running the unit through diagnostics. See link below for the manual.
When A problem like this happens you can check to see if the evaporator cover is visually damaged. Any cracks or breaks can let warm air to leak into the evaporator compartment. These covers can also flex by themselves over time to cause an air leak. They must have a good seal and not be bowed at all or replace the cover with new seal.
So your options are to test the defrost thermistor and make sure it’s within specifications.There are no service bulletins on this model. Matt Ace
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