Rec/Con fuse shutting off

The breaker is 15. I might have mentioned that in a previous post, this conversation has been a long one. I have explained that my heaters are 1,500 each like most space heaters are. I have never and do not run them at 1,500. I run each at half that in two different rooms. I have done this three years in this rig and seven years in my old Alfa. I have ordered a new breaker which will be here Tuesday. My Cougar is not a big fancy RV, it is lite and probably not built very well, but it is all I have. Meanwhile, we expect a hard freeze here on the South Oregon Coast down to 28 from Wed-Fri. I will be running my propane furnace during that time and also my living room heater at half. I already have the meter as mentioned before and will be checking everything by Tuesday. We have a holiday coming up and my town of 2,000 shuts down, nothing open. I got 1.7 inches of rain overnight, snow in the mtns. I will let y'all know how things work out, thanks for your help, and I am sure your comments will be very helpful to someone else down the line. I don't see a place to add photos, but I have them.