We just ran into this issue with our 2018 Grand Cherokee - it's less than 3 years old but past the mileage covered under the original warranty. We purchased it certified pre-owned six months ago. The evaporator needs to be replaced and our dealership is quoting $2,800. I'm curious if there is a place where owners are documenting these issues and if there has been any exploration of a potential class-action lawsuit, based on the number of similar complaints I have seen just with a quick Google search today? It seems like an incredibly common issue, from what we can see.