Chrysler Repair: Heater Fan on 2000 Chrysler Cirrus, blower motor resistor, chrysler cirrus

Question
I have a 2000 Chrysler Cirrus, I have recently had the cooling system flushed and a new thermostat installed due to no heat (cool air)in idle. My problem now is the fan speeds only work on the high setting blows on full bore only no in-between. Thanks in advance  

Answer
Hi John,
This is a common problem with a straightforward solution:
On the blower motor, there is a part called the blower motor resistor block that has the function of providing several different voltages so the blower turns at the various speeds you can select. When the the resistor block suffers an electrical failure it will behave exactly how you describe it. So you need a blower motor resistor block which you can either get at the parts department of a Chrysler dealer or from a wreck in a do-it-yourself yard.
The block is located on the underside of the heater/AC unit at the right side end of that unit, just to the left of the blower motor. The resistors are actually positioned in an air duct that has air from the blower flowing past it when the blower is on. The air serves to dissipate the heat from the resistors. To get to the block you need to remove the lower right underpanel silencer duct. Then you should see the outside of the blower motor (you can turn on the blower to help you find it by its sound). There is a wire from the motor that goes to the resistor block. So follow that wire to the block and remove the plug at the block. Then you will see that there are 2 screws holding the block in place which if you remove will allow the block to drop down and out of the air duct in which it is mounted. Then replace it with the new one and reverse the steps. That should give you all the different blower speeds again.