I received my K3 (s/n 4521) in early August 2010 and I have never seen the two fans on the rear turning. My typical FP temp was pretty steady at 37C; my typical PA temp was pretty steady at 33C. Note, I seldom run my K3 over about 30 watts output because it is driving an amp. In looking at page 56 of my manual (Rev D7) I see in the description of KP3A-F "PA fan test settings (PA FN1-FN4 or PAIO FN1-FN4), and ..." I have assumed operation of the two fans are thermostatically controlled? Can someone please explain the meaning of 'PA FN1-FN4' and 'PAIO FN1-FN4' ? I have no clue what that means! I now have KPA3 set for Fn2 and both fans are running and the FP temp is reading 33C while the PA temp is now reading 27C. Somewhere in the manual I'm sure this must be explained to the user, but I can't find it. Thanks for any help. Tom - W4BQF
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