The heater (A/C) resistor only works on high ( three settings: low, medium, high

What is your question?

I bought this truck used with 100,450 miles. The dealer replaced this part twice and my friend replaced it once. Each time, it works for awhile and then suddenly, it only works on high, again. Any suggestions as to how to fix this permanently? Thanks

How long has your 2007 Dodge Dakota had this problem?

had this problem since I bought the used truck in October, 2019