It even smells when its off! But mostley after it heats, then shuts off... It stinks up my whole room! My grandma REFUSES to belive its coming from the vents, but I put my nose down there... Its coming from the vents.. and I just wanna know what the problem is, I keep googling but its never MY situation, My room constantly smells like poop and wakes me up all the time! Please help by giving me some type of answer on what is wrong. Its not a very old system, does it need to be cleaned regularly? I dont know anything about it! IT IS NOT AN A/C, JUST A HEATER!!! It smells right now.