Hello, havea 2001 Prius going strong except for the ac. The button light blinks on the ac switch, and the compressor seems to shut off. But some times the ac works fine. I brought it into the dealer and they said I need a new compressor, around $1400 bucks. I thing it's a temp sensor, otherwise, why is the ac nice and cold and can stay on for some period before going off? Is there anyway to really tell what it is?