Antminer S3 tempeture Sensor

[cuz0882]

One of the boards on my Antminer S3 displays 90c soon as it comes on and then climbs to around 115c in under a minute. It's making the fans go on high right when it powers up. It doesn't seem like a accurate temperature reading to me. I tried re-pasted the outside heat sinks the inner ones look like a pain to remove.  Any ideas or work arounds?