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Hi my name is Robert..
Not sure if the temp. would cause the fuse to blow. Right off the bat what I would try and do is hook up another 12 volt DC source and see what happens. Sometimes a power converter can put out AC ripple or dirty voltage and the board does not like it so I would try that to start, I would check what the DC voltage is as well coming into the board when this is occurring. I would do any voltage checks you can in the service manual, check the thermistor, heating element etc. Click HERE for a service manual, when you troubleshoot these it is a process of elimination. IF you are using any extension cords on the main cord you plug into please let me know. Normally when a fuse blows it has to do with a short or wiring problem vs temp. IF everything checks out in the manual then I would try a new board and see what happens.... Hope this helps some.... IF you have more questions or concerns please feel free to contact me.... Robert
Hi... Was just checking in to see if my answer helped??? IF you have more questions or concerns please feel free to contact me...