Thank you all for the tips and pointers. Driving the Vibe last night, and having the fan switch set to High, air began to blow from the system once again. Very odd. It worked fine again today. I figure I'll see if there are any corroded or loose connections next time it stops working before changing...

Hello,As of this morning, the fan knob on our '04 Vibe does nothing when turned from off through all settings. The A/C light does come on when I turn the knob from off and press the A/C button so the knob doesn't readily appear to be the culprit. What is the likely issue that will not afford any fan...