They're not the intake exhaust blowers, they're the side fans that blow air along the back, up through the pipes into the room, they worked before i unplugged one to clean it, but now both no longer wanna ramp up, the one that i took out tries to turn but then stops, they both spin freely then i manually turn them, idk whats going on or what happened, going to get -13c during the night, hope someone can reply soon