Hi I want to give my stove a good cleaning today. I've taken the back panel off last week but could not get the fan out. The Harman XXV manual claims there are 3 wing nuts holding it in. Not the case! 2 wing nut and a long bolt. Any advise how to loosen that bolt would be huge. My stove is Kiddy Corner to the wall & I have barely any room working in back of it.