Red light won't turn off

Question

The red indicator light is on and won't turn off. I've changed the bag so it's a brand new bag but the light is still on. I also looked to see if the filter was dirty or clogged and it's not. When I turn on the vacuum it looks like smoke is coming out but nothing smells like it's burning. I don't know if it is just dust or what. What else could be the problem? I have the Simplicity 6 series vacuum