I just purchased a new Little Mark 2. I see it has a fan. Can someone please let me know if it is suppose to run all the time or come on when needed? I have an Eden WTX-260 and the fan runs all the time and keeps it cool as a cucumber. The LMK 2 definitely feels warmer to the touch. Not hot, just warm. I just want to make sure it is alright. Good tone by the way.