[Elecraft] KPA 100 glitch

[George Winship, NC5G]

My shack is in a separate building from the house and is not heated or cooled
unless I am in there. Twice, since the weather has finally cooled here in
Texas, I have had the following problem with my KPA 100. When I turn on the
K2/100, the cooling fan immediately goes to high speed. When keying the rig,
the display shows "Hi Refl" followed by "PA HOT". There is no output.
Turning the power down to below 10 watts to turn the KPA 100 off allows the
K2 to transmit, but the fan stays on. Both times that this has happened the
shack temp was in the forties. After the shack and radios warm up all is
normal again. Visual inspection has not revealed anything. 

Any ideas on where and what to look for? BTW, the K2/100 has been in this
enviroment for several years with no problems. 

George, NC5G
K2-2217
 
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