Have an older camper van with a Domestic refrigerator (just electric). The refrigerator has some issue. I always thought it worked off the house battery, which (I think) only charges from the electric cord? The refrigerator has always worked when parked in the drive way (which is on a slant). Now it doesn't get cold. Everything else seems to work fine. When I take it for a short drive, the refrigerator gets cold. When I park it again, and plug the camper in, the refrigerator warms up again. There's a little red light on the top of the refrigerator that blinks. (Is that to show the battery is low?) If that is the case, why would the refrigerator work when I drive it? I'm confused. So, does anyone have any idea what is going on?