Yours must be better than mine or you keep it running all the time.Originally Posted by frosty
Mine makes a hissing noise sometimes as well. The colder it is the quieter it hisses. Not sure why but I do know one thing. When I go outside tomorrow morning my scangauge is going to say 100*F even though it is below zero outside. I love my block heater
I run mine on a time delay to turn on 3ish hours before I leave in the morning if I work and that will keep it at +50 of the ambient temp outside, normally. Like this past weekend it was -10 overnight, car was +45-50 when I went to start it.
