Air Conditioner blower motor resistor was replaced 2 years ago when ac blower stopped working. Blower is not workinga again, i replaced the blower motor resistor (behind glove box) and still not working. Any suggestions?

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.

Would need to know what make , model an year the vehicle is ?

You should have checked for voltage at the blower motor connector before replacing the motor .Could have a bad blower motor resistor, this part controls the different speeds . Have you checked for blown fuses ? There could be a bad blower motor relay ! Need to know year an make an model to check out wiring diagram to see what is involved in this circuit !

A/c compressor works fine and the blower motor works and shutdown right? it is the problem with the blower resistor or with blower motor relay. try to direct the resistor irrespective of the speed. hope the problem may be solved.

Replacing the AC blower motor resistor in most cases cures this problem. The blower motor resistor is located next to the blower motor and the connector is on the outside of the air ducting.

Its either a bad connection on the blower motor resistor or a faulty blower motor resistor.These are known for over heating.

You may have 2 separate problems, check the bower motor resistor first, if it's bad replace it and THEN you should have the fan blowing on the lower settings.

If the ac turns on after you fix this then problem solved, if not it may be unrelated have a pro look at the ac.

This is definitely 100% the Blower Motor Resistor.
Replace this and all speeds will work fine.
This Resistor is defined with 3 to 4 wires going into it, and is located adjacent to the Blower Motor.
It is easily access, removed and replaced.
I will post an additional comment on Part Number, Price and where available.
Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

It means the blower fan is not running, look for wires that got knocked off, usually at the motor....

Good news is the AC sounds like it is working correctly, so this repair cost should be smaller. Apply external power to the fan terminal to see if it goes, if it does, problem is upstream, switch, resistors, etc.

But sounds like a fan. Test it. independently from the rest of the car

blower motor or resistor or the blower motor control switch.