Blower is 100%. AFTER A NEW RESISTOR

2009 Frontier Pro-4X CC SB.

Timeline:
- Fans started blowing full after 45 minutes of driving (This sucks)
- Disconnected the Resistor and the fans stopped
- Ordered a 4-fin replacement (Part here: More Information for BECK/ARNLEY 2040097)
- After received, tested it hanging in the passenger foot well, and the dash controller worked like a charm again
- Bolted it into place, retested, and it's all good
- The next morning, I drove the car for 2 minutes, turned on the blower, and it went full blast again, and had to disconnect the new unit.
- Got another resistor from a junk yard, and it immediately put the fans to 100% as well.

I feel like something upstream of the resistor is out of wack.

Any advice on this annoying issue would be greatly appreciated!