Sheeterangel

We are in Ohio where it is very cold. We noticed that our slides are leaking very cold air from outside. Seems to be around the refrigerator. Pulled in or out, it is still leaking cold air. I am thinking it is coming from the two refrigerator vents on the outside. My question is can I cover these vents? I am hooked up to shore power. Or if you have any other suggestions, please let me know.

Can someone please tell me where the house battery cutoff is on a 2003 Fleetwood Discovery? It says to cut them off when you are on shore power so they will charge. Ours is steady discharging and when we cut off the aux switch when we are on shore power, everything goes off. Helppppppp