I've been going through the HVAC system part by part to fix my cooling problem (running heater all the time, only cool on lowest temp setting) and eventually this led me to removing the controller. i found one of the black wire on the bottom side not connected to anything...it looks like its supposed to feed to the inside of the temp control knob (which is loose)...can anyone help me with this? whats its function, just for a light, or might it be my temperature problem?
