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2003 V8 4.7L club cab
Replaced blower motor and resistor today and it still does not blow anything! Fuses fine. Just stopped working for some reason. Thermostat maybe? Any ideas? It seems to get a little warm but when dials turned nothing happens. Rear defroster button lights up and works. All dials are plugged in. Battery is fully charged. Any ideas? Doubt it’s the heater core but with my luck
 

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Sounds more like the HVAC control panel has gone bad. The fact that the fan does turn but doesn’t change speed even after changing the blower motor resistor is a clue to look at the HVAC control panel. You can get these from RockAuto new so you don’t have to take a chance with a junkyard one that could have the same issue or something else that won’t make it work.
 
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