Engine fan

[muhlum]

Hello, so I have a 2010 prostar and the fan seems like it is kicking in way too often, even when the water temp is well below 200. I called international about it and they tell me it's from running the AC. Well, I know that's crap because I've tried running it both ways. When I'm going down the road it doesn't bother, but if I'm sitting idle or if I'm just going slower 25 mph or less it'll kick in every 30 seconds and run for one minute like clockwork. Is this normal? Would sure be nice if I could pull into the field without kicking up a dust storm.

Unrelated but something else that's been bothering me, sometimes I'll see white puffs of smoke out of the exhaust. About puff one/second, always figured it was regenerating. Generally see it when trying to get up to speed. Thanks in advance.