Hey everyone... When I first bought my ZHP, the coolant light would come on and off. After checking the coolant levels, and seeing everything was fine, I asked a few people who said the light(s) in older BMWs sometimes go on and off for no reason. Okay, no big deal then... Well, then it went away and was gone for a few weeks. I checked the level again to make sure it was using some sort of sick reverse psych on me (joke, of course), and everything was fine. Well, today is a rainy day here in Raleigh, NC... so I turned my A/C on. A couple minutes later, the coolant light comes on. I then realized that i haven't had my A/C on in a couple of weeks and that something must be triggering the light when the A/C is on. Any thoughts?

TLDR: The coolant level light comes on when the A/C is on: any idea why?