Hello- I have a 2019 Forest River Ozark light 1650 BH. I have a lithium battery that is fully charged and when I try to turn on the refrigerator, the furnace goes on- it won’t shut off. I also have no thermostat because work was done and got taken out and not replaced.. I tried to pull some fuses but that did not stop the furnace from continuing. I went outside and opened up the panel and I don’t see any kind of shut off switch. It is a suburban model. If anybody can guide me so that I can run my refrigerator and lights without that happening, it would be great. I do not know why it does this and I have messed around with the fuses and it still stays on.