2012Coleman, My friend and I both have the same High Pointe microwave in our campers that you have. Both of our microwaves are acting just like yours. Our campers are on seasonal sites. September 15 before I left our site I unplugged the microwave from its outlet. Friday, September 19 I plugged the microwave back in. It worked like it should ALL weekend! My friend and my trailers are 2014 units bought in summer of 2013. I believe the symptoms your, my friend and my microwave are having is a manufacture defect. I am having a hard time convincing the owner of the dealership where I bought my trailer that it is a manufacture's defect.