Hello,

The last several times I've turned the car on and started driving with the AC system on auto and a cooler temperature than outside I have gotten rather light headed within a few minutes.

I was starting to think I had some heart condition until I realized this only happen when driving in my car with AC. The last time this started I immediately turned the system off and rolled the windows down and the effects stopped increasing and subsided shortly.

Could this possible be freon leaking from the AC system into the cabin? Any other thoughts?