They suggested replacing this fan. It is measuring 98F immediately after turning off. Ambient was close to 80F.
This doesn't seem bad to me but I'm still pretty wet behind the ears when it comes to IR. It's a NULINE #02557734 fan. I can't find much info on it. It doesn't come with a data sheet. The most useful info I can find concerning temp is that its max ambient temp is 176F.