Hi all,
Car: 2006 base roadster, 6 speed manual.
Problem 1: The Climate Control unit keeps blowing warm air out.
Problem 2: The fan switch is not working properly (I'm assuming it's a bad potentiometer). When I turn the dial it seems to work at some speeds not at others. Also if I shake the **** it while it's on say position 4, the fan speed will studder.
What I've done so far: After reading some of the threads on here, I have changed the blower motor resistor with a unit from Amazon. I've rebuilt the Duo-Valve. Changed the cabin filter. I've also done the flushing procedure. (Let the car run on high temp for 30 minutes with windows shut).
It is still blowing warm air with the temperature controls set at neutral. If I go full A/C it blows semi cold air.

Any help would be appreciated. Thank you.