My furnace is not blowing, so I guess that the fan isn't working, I looked down where the fan is and it does nothing when I turn it on so it results in the whole system turning off. What should I do or what is it that I need to do to fix the problem??

Check to see if the blower will work if you turn the fan switch to on at the thermostat. If its not working it could be the blower, run capacitor or control board that is bad. Are you handy with a volt meter to check it?