[Elecraft] K3 HI-TEMP ALARM

[OH1MA]

Hi

I have same problem, when shack temperature is below 17 degrees Celcius

When PA Temp is higher than 25 degrees C then power is OK.

Jaakko OH1MA / K3 ser. 2952


Hi Elecrafters!

I have problem on my K3/100 (S/N3050, factory assembled).
When I transmit more than 12W(means hi power amp on)
  within about 30min after mains power on, HI-TEMP alarm
occur and equipment is forced to set 5W.

No problem at all when hi-power amp is through ( Po<12W ).

Any idea?
Thanks in advance
73, Atsu JE1TRV