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It is not the blower motor. On the 2002 model, I am showing an HVAC control module and a blower control processor. The control module handles the temp control and blower speed, and the processor contains the resistor for slower blower speeds. Which component did you replace ?
It may have a controller that has failed. The system may not work if the blower is dead. There are a dozen or more components involved. You'll need someone to check and see if the blower motor is getting voltage and go from there.
Yes I would highl suspect is the blower resistor. Try the fan without the AC and see if it blows only on high or on other settings. If it is similar to the when you have the AC on, then it is the blower resistor that needs to installed.
FIRST I CHECK ALL FUSES AND RELAY.TO BLOWER MOTOR IF IT STOP BLOWING.AND CHECK FUSE TO HVAC SWITCH CONTROL.AND CHECK FUSE / RELAY TO AC COMPRESSOR.IF FUSE / RELAY GOOD POWER GETTING TO AC COMPRESOR CLUTCH COIL AND LOW PRESSURE SIDE 28 PSI AND HIGH SIDE 200 PSI. CLUTCH COIL IS OPEN.IF REFRIGERANT LEVEL LOW YOU MAY NEED MORE REFRIGERANT.YOU NEED AT LEAST 28 PSI ON LOW SIDE AND 200 - 220 PSI ON HIGH SIDE.IF ALL IS GOOD STILL NO AC PROBLEM COULD BE A FAULTY AC CLUTCH CYCLING PRESSURE SWITCH.