We have a the Dometic 2852 in our new ElkRidge. I've never had a refrigerator with a built in fan. I comes on and off but this morning the fan got very loud. Didn't sound normal at all. In all the different units I've had in the past none of them had an automatic fan so it kind of surprised me to hear it running but now it seems like something is wrong. Has anyone had this problem with this model?