Heater climate control Temp control

I know, because mine does this, but the blower will only work in a couple of settings, (1,3,etc.,) I know that this is the heater resistor.

My question is does anyone know if the temp control dial can or do the same?

We have a small leak in the radiator, so sometimes there is a air bubble that causes the heat to turn cold, but sometimes when I'm pretty sure I have no air in the coolent system, I still get inconsistent hot/cold air. Could the temp control have a resistor promblem too? ....OR could the temp control dial have "dead" spot or should say dirty connections inside of it?

:1zhelp:

thanks