I assume you want an honest answer so I will give you that and another answer. You are suppose to leave anything attached and if you need to unscrew, unbolt, cut, saw out or pry off than you should leave it. Personal property can be removed but a furnace is not personal property and neither is a light fixture.
Now, in all honesty you have nothing since you are being evicted from your home. You likely don't have the pot to pee in (unless you take the toilet too but you did not mention that) so what will the bank do? Would putting you in jail get them much, other than the satisfaction?