Q: Q: Heater not blowing air

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I changed heater motor and resister. Heater motor runs now but is not blowing air. When I change the speed control on the dash it's stuck on one speed still like it was before I changed the resistor. What else could it be, the switch on the dash? Truck has 160.000 on it

My car has 16000 miles.
My car has an automatic transmission.

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