i think it probably because the motor has a ground problem or it has bad brushes and is is drawing to much energy for the resistor
replace the blower motor switch
Blown fuse, defective blower motor, or defective blower motor resistor pack.
The Blower resistor should be tested which is located near the blower motor, the resistor is probably faulty.
The blower motor resistor pack is bad.
Under the dash, on the passenger side.
Blown fuse, defective Blower Motor Resistor Pack, Defective Blower Motor, or Defective Blower Motor speed control switch.
blower motor resistor is burned out
In a 2000 Dodge Stratus, the blower motor resistor is typically located under the dashboard on the passenger side, near the blower motor itself. You may need to remove the lower dash panel to access it. The resistor is often mounted to the HVAC housing and can be identified by its electrical connector and multiple terminals.
A malfunctioning blower motor resistor will cause the blower motor not to work. When the resistor is bad the blower motors will not turn on.
Bad Blower motor fuse Bad blower motor resistor Bad blower motor Bad switch Evaporator plugged- not allowing air flow
The a/c heater blower motor resister is located in the vehicle on the passengers side inside the housing next to the blower motor...............Remove the blower motor resistor wire harness connector.Remove the blower motor resistor screws.Remove the blower motor resistor.
Bad blower motor fuse? Bad blower motor resistor pack? Bad blower motor - checck to see if it is getting power--if so bad motor Bad switch?