Thanks all, that's what I thought as well, just wanted to make sure though. With all of the problems that I've been experiencing, I'm probably more worried than I should be!
Yes, I already knew about that. Instead, I decided to let it do its thing and not turn off the engine assisted heat; because it seems like the heater is stronger when the engine comes on. I think it works out ok if I'm doing a trip over the amount of my electric range, and the engine is going to come on eventually anyway.Turn off "engine assisted heat while plugged in." (assuming you are pre-heating while plugged in of course).