The temp light issue comes and goes in mine. For some bizarre reason it usually happens to me right after I clean the Pax. It is really not a major issue for me, I'm used to it. The first thing you should try any time you get the problem is to remove the mouthpiece and blow through the stem. I have no idea why this works, it doesn't make any sense to me at all, and I didn't believe it would when I read about it, but it works for me about 90% of the time.