have a 2000 jeep sport the heater blower will run sometimes and other times the blower will not work. i have replace the blower moter resistor 2 times now.when the blower works the fan will only work in two out of 4 settings (2 and 4)i talked to mechanic at work and hes the on tald me replace the resistor. is there a in cabin filter that could be replaced.

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