Only High speed blower front on 01 dodge grand carvan

First check ballast resistor in the air duct under hood.

Most likely neither. The most common cause is that an electrical device called the blower motor resister block, has failed. This device provides all the slower speeds. It is generally mounted in the HVAC [Heating, Ventilation & Air Conditioning] box, very close to the blower motor. FYI, we mechanics call the fan motor inside the cabin the blower motor. The electric fan motor behind the radiator is called the cooling fan motor.
If the resistor block is OK, then you have either a bad fan speed switch or a melted electrical connector at that switch. 95% of the time, the resister block is the problem.
Charlie

Hi!!
When the Blower Motor Resistor (controls blower speeds) goes bad, the blower motor works only on HIGH SPEED. REPLACE IT.
BLOWER MOTOR RESISTOR Removal & Installation

• Disconnect negative battery cable.
• Remove right lower instrument panel insulator panel.
• Disconnect blower resistor connector located behind right side of dash.
• Remove blower resistor screws and blower resistor.

To install, reverse removal procedure
Good Luck!! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa!!

sounds like it is the blower fan resistor, there is a wire for every speed of the blower motor. so if a wire burns out, you will loose that speed. the resistor is located behind glove box.

There should be. Replace the front resistor,then check the operation of both fans.If the reaer is still the same,replace the rear resistor as well.
Please rate this.

probablt front blower motor or switch,can test blower motor by running auxiliary power and growd to front blower motor.Can test switch with DVOM.

I had the same thing happpen with mine. The unit is located behind the glove box and is just left of the fan held in place with two screws. I bought a new resistor from radio shack and installed it in the unit.

more than likely the blower resistor about 50 bucks to fix

If you are looking for the fan blower resistor, it is located behind the glove box. No tools need to get to it and a nut driver to remove the 2 screws to replace it. A 20$ part.

it could be a bad switch a bad fuse or motor going bad most likely bad switch