Updated/edited to provide some clarification on the issue.

I'm experiencing an issue where temp3 on the avalon unit always shows a value of 0.  Here is the relevant section from the 'Cgminer API Log':

[STATS0] =>
(
   ......
   [fan1] => 0
   [fan2] => 780
   [fan3] => 800
   [temp1] => 30
   [temp2] => -1
   [temp3] => 0
   ......
}

I understand only 2 temperature sensors are present, and reported via 'temp1' and 'temp3'.  temp2 is unused currently.

As you can see, the second temperature sensor 'temp3' is reporting constant 0 value.  When unit is hashing for 20+ minutes, fans stay at very low RPMs (~700-800).  This issue is unique to this one unit.  After scouring the forum, and confirming with one other Avalon user on IRC, it appears temp3 should also report non-zero value.  Is this wrong?

Any suggestions?  I am afraid to keep it running, as the fan speed stays very low and I do not think it is providing adequate cooling due to low temp3 sensor value.

Thanks.