My furnace is not running. The induction fan was running contiuously and then I change the sensor for it and now it is doing noting. I have a concord furnace. I tried to jump the thermostat but nothing happened

What sensor? Do you mean you changed the pressure switch? If so, how many wires hook to the pressure switch? Lots of options here. Let me know more about your problem and we will see what we can come up with.