Chrysler Repair: A/C Problem, chrysler cars, debris leaf

Question
" Question
1998  2.4 L4 / 16 V

When I turn on the A/C heater control switch on modes One two or fan the A/C or the heater dose not work. Overall when I turn the A/C heater control switch on the high mode the A/C &
heater works just fine . What could be causing this problem ?



Thank You
"


Answer
Hi Tony,
While I do not claim expertise in Chrysler cars after 1995 because I haven't worked on them nor do I have any service manuals for those model years, if what you are experiencing is the non-operation of the blower fan at low and intermediate speeds, but that the fan will operate at high speed, then from my understanding of how Chrysler typically engineers a multispeed blower fan I can suggest that the "resistor block" which is used to decrease the voltage to the blower motor to reduce the blower speed has become non-fundtional (a resistor has burned out). The resistor block thru the mid-90's model years is located such that the resistors are in the trough below the windshield where the fresh air intake occurs and the electrical plug-in for the resistor block is on the cabin side of that same trough. I believe that the resistor block can thus be removed and replaced with a new unit quite quickly. But I cannot say for sure that is the case with your '98 model car. But my best advice if the fan will only blow at high speed is that the resistor block is defective. If you are of a mind to go look for it, you might find it by removing any debris/leaf screening on top of the air intake for the heater/ac system and thus have visual access to seek a modest size unit on the back wall of the trough which has some coils of wire (the resistors). This would likely be on the passenger side of the trough rather than the driver side. It would be held in place by 2 of 4 screws, the heads of which might be on the external side so you could loosen and remove it and the plug would come out of the hole in the trough that reaches the cabin side. If not, then look at the same location from inside the car (which may require removal of the glove box) for the retaining screws for the resistor block. I am describing the design based on '95 technology so don't hold me to this description.
Roland