hey guys my heater doesnt work at all! the guy i bought it from took out the a/c. It wont blow any air at all and when i try to move the fan knob it wont nudge, also i can only turn the hot/cold knob halfway or it feels like it will break. however all the lights work on it and i can change all the positions but nothing happens. PLEASE HELP btw i tried searching but nothing covered my specific situation… thanks