Sounds like a vacuum hose could be broken and the vent louvers are not being actuated.
Defective blower motor resistor pack.
check the blower fuse, temperature sensor on the radiator,switch on the dashboard and the blower relay switch.
Check to see if you are getting power to the blower motor - if so motor is defective if not problem in circuitry to blower motor
The blower in my 2001 Honda Civic did not stop working.
Blown fuse, defective blower motor resistor pack, defective blower motor, or loose or disconnected wiring.
Ours did this and the on/off switch was bad.
2004 ford expedition front blower not working
Check to see if you are getting power to blower motor - if so replace blower motor If not check fuse, switch, resistor pack.
Thermostat possibly stuck open or heater control valve broken. Now if you mean the blower motor has stopped working, check the fuse, blower motor itself, or the blower motor resistor pack.
Check the blower resister and then check the blower motor switch..
ZX2 blower sits right behind/underneath the glove box on the passenger side. If your blower stopped, clean the contacts of the blower electrical connector first (and see if that helps) before you experiment with the blower; you may want to replace the connector if that is the problem origin. BKT
Work you way from the blower motor first by checking that it has both power and ground and then check the rest of the electrical system............