I'm driving a '97 Legacy Outback automatic with 100K+ miles on it.
The weather is cold here, so after the car had warmed up I turned the heater on, but got cold air coming from my vents.
About 2 minutes after dicovering that, my temperature gauge shot all the way to the top.
I turned for home, turning the car off as needed to let the engine cool.
Seemed normal otherwise. No odors or smoke coming out of the car.
Any thought on what's going on?