William. It is not safe to leave that electric oven on with the door open. I just went through something similiar, but I have four space heaters. Mainenance replace my dangerous old furnace with a non-working new furnace. It took 16 days for a part to come from Mexico to repair the new furnace. When the part came - it still didn't work. So, they ended up replacing the replacement with a furnace from a different manufacturer. I spent, approximately, 17 days going from room to room wearing extra clothing and turning on whatever space heater was closest to me.
But, once in awhile, I did turn on my oven for about an hour, but I would shut it off BEFORE I opened the oven door.
William, do you have any leaks around your window or your door? Every Winter, I insulate all my windows with plastic and block drafts from my front door. This year, I, also, used aluminum tape to seal every place around my windows and patio doors where I felt a cold air leak. A well insulated apartment will keep in heat. You may want to invest in a small space heater. They really are not expensive and you may be able to get one on sale now that there is only, approximately, 2 1/2 months of Winter left. You may, also, want to invest in an electric blanket if you do not have one.
I know that some of the suggestions that I am making may stretch your budget. May I suggest that you ask the manager of your facility if there are space heaters available for residents who may need extra heat in their unit? Or, you may, also, ask them if maintenance could check your unit for places where cold air is leaking in. Hope this helps.
