These temps are quite similar to mine, and I have seen no strange behaviour.Lo 51
I have been told this is too hot. The 9242 is in an enclosed shelf but open in the front and back.
Air circulates through but I imagine is gets hotter than if it were simply sitting on an open shelf. There is an EHD attached to it also.
I have never had any problems with my 9242 (overheating or otherwise) since I bought it for 299$ almost 2 yrs ago.
Hope this helps.