Heater and ac blower doesn't work vents heat and cool air but blower doesn't work

There are several possible reasons why your blower, vent, defrost, AC, and heater might stop blowing air:

1. Blower Motor Failure: The blower motor is responsible for blowing the air through the vents. If the blower motor fails, you will not get any airflow from the vents.
2. Blower Motor Resistor Failure: The blower motor resistor controls the speed of the blower motor. If the resistor fails, the blower motor may stop working or only work at one speed.
3. Fuse or Relay Failure: A blown fuse or faulty relay in the blower motor circuit can prevent the blower motor from working.
4. Control Module Failure: The HVAC (heating, ventilation, and air conditioning) control module is responsible for controlling the blower motor and other components. If the control module fails, it can prevent the blower motor from working.
5. Vacuum Leak: If your vehicle uses a vacuum system to control the vents, a vacuum leak can prevent the system from working properly.
6. Broken Blend Door: The blend door controls the direction of the airflow. If the blend door breaks or gets stuck, the air may not flow through the correct vents.
7. Wiring or Connector Issues: Faulty wiring or connectors in the blower motor circuit can prevent the blower motor from working.

You need to clarify a little . No heater , or do you mean there is no air coming from vents . This would be a heater blower motor problem . Or is there air coming from the vents but it's cold , no heat ?

Is it just the AC or does the heater and vent also only blow on 1 and 4? If it does happen in all modes then the blower resistor pack is more than likely bad.

The blend air door stuck in cool position

I woild be checking the vent controls as if the ac is working and the core was blocked then the air would be cool when the heat was selected but not changing Fixing the heater has resulted in a /c not being good enough to cool the air if the vent is not properly selecting. The point is that if the vent selection is not working properly (vacuum hoses) then the 2 faults will be related.

There is a possibility that the fan may have came off The motor shaft/spindle which has to rotate to blow the air to the vents

You more than likely have a problem with the temperature control blend door inside the air ducting, this door sits between the heater core and the AC evaporator core and mixes the air for the desired temp at the registers/vents. More than likely it is sticking due to being warped from heat. To replace this door and its actuator requires the dash be removed from the car.

Does the heater blow cold air from the vents or do you mean the there is no airflow from the vents? cold air from the dash vents when the heater control valve is set fully hot could be an air pocket in the cooling system. The radiator sits slightly lower than the engine causing air pockets to get trapped in the engine when you replace the coolant. you'll have to purge the cooling system to restore flow to the heater core. No airflow (blower motor inop) this could be a bad blower motor transistor. pin test the blower motor circuit.

This problem is caused my the blend door actuator motor, the electric motor turns to allow the flap to open either to cool or heat and then through the vents. The problem has been either the motor is going bad or the actual motor stops working. There are small plastic gears that strip in the motor causing this. I have replaced several in the rear unit. The front one is under the dash next to the heater core. The dashboard must be removed. It is a big job.
Please rate me and let me know if this helped.

Common issue. Your air ducts were not reassembled properly and so the blower fan is working but the air is going out wherever the air duct is improperly fitted. Also the fan gate ( a metal gate that is used to block off any heat entering the system when you have the a/c on may be stuck in the close position. Whatever the case it can be repaired by getting in the sysem under the passenger side of the underside of the dash. You may want a professional mechanic to perform thid because it is a bit of a job to access all of the items needed. Hope this helps!!!