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So i have 05 saab 9-3 just put in a new blower motor resistor, worked fine.. then it would keep running with the car off and then it stopped working. What could be the issue?
 

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So i have 05 saab 9-3 just put in a new blower motor resistor, worked fine.. then it would keep running with the car off and then it stopped working. What could be the issue?
Steps to diagnose:
1. check the fuses associated with the climate control -see car manual
2. check the electrical in to the fan motor with a multimeter to see if the resistor is working properly at different speeds
3. If #2 no, then replace resistor (get a refund) ; If #2 yes, you have to replace the fan motor
 
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