02 Prius a/c question

First of all, is there a forum for 2002 Prii?

If not, I have a question about my a/c (which I don't use very often in VT). I will set the temperature, push the "A/C" button with or without the "Max" button. I'll get cold air for a while, then the button lights will blink and eventually the air will become war. I can turn the A/C off and on (like a computer) and it will work fine for a while, then the light blinks and the air warms up.

Any comments?