Ultra 2 Temp 1 sensor

I'm curious what the outcome was for the original poster. My ultra 2+ runs just as hot. I was initially concerned when I purchased the unit because compiles would cause it to send overheat messages. Then after I got it setup, it was one of those out of sight, out of mind issues.

It's currently idling at 761rpm with temp 1: 168F, temp 2: 95F. It's in an open air setting with ambient 78F. When the temp creeps closer to 170F, the fan eventually kicks up to ~1200 or ~1500 until the temps are down to 159F/91F. Then the fan drops back to ~760 rpms and the temp goes back up.

Tonight my phone starts blipping with overheating emails while I was recompiling some apps.

Aug  8 00:20:40 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 82.0C/179.6F].
Aug  8 00:20:40 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 82.0C/179.6F]. 
Aug  8 00:21:06 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 82.0C/179.6F].
Aug  8 00:21:06 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 82.0C/179.6F]. 
Aug  8 00:21:33 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 83.0C/181.4F].
Aug  8 00:21:33 ReadyNAS-Ultra2 RAIDiator: Temperature sensor 1 reports out of normal range [expected range: 0-80C/32-176F, current: 83.0C/181.4F]. 

If relevant, because I see it mentioned in another thread, I also have "Unable to read TjMax from CPU" in my logs.