I agree with Impala. It'll stop once it warms up. But it'll continue to get worse. If you're a dumbass like me, you'll let it go till next winter, and then be in your garage one night when it's 20 degrees out replacing it. I might suggest you order one & replace it when you're able to. I also used the $129 unit from FCPGroton. It's a little louder overall than the other one, but it works like a champ. I would budget 2 hours for the repair (instructions on volvospeed.com are perfect). The 2 hardest things were removing the knee bolster and actually fitting the new fan back in, but even that wasn't too difficult(lots of wires & cables in the way). But it can be done. Good luck.