[Sask Attak]

I have a 2006 GT that won't blow heat at any engine speed. It blows slightly warm air. The water temperature is normal and the coolant level is good. After getting slightly frustrated I turned the temperature control knob to max cold and back to max hot twice and then it started blowing hot like normal. What would cause this problem?

 

[Abyssul]

If it doesnt happen anymore then don't worry about it. If it still does it, then it could be a faulty HVAC cluster? I haven't heard of this before.