I have a GE range model no.- JGBS10WEH3WW and it hasn't been running right for awhile, It is natural gas and I have no problem with the top burners, it is the oven that is the problem. A few months ago it started running non stop, I had to turn the gas off to get the oven off. Now over the last month or so, I can't even get the oven to turn on. I just replaced the ignitor on it and it still won't turn on. Again, the top burners work great. Any help would be greatly appreciated, I'm trying to get this fixed for the upcoming holidays. Thank You.