I have a Frididaire Electrolux model number FDB231OLCC2 dishwasher. I have no idea how old it is, but I'm guessing in the 5-10 year range - could be older, could be newer. It has recently started having a horrible burning smell when we run it. It doesn't start immediately and comes and goes during the cycle. I have the "no heat dry" cycle selected, so it shouldn't be that - and it does it in the middle of the cycle, not at the end when it would be drying. I have checked the heating element in the bottom of the machine, but I don't see anything on it. It doesn't seem to be coming from inside the machine though - when I open the door I don't smell it, it's from the outside somewhere. Any ideas what this could be and how I could possibly fix it? Thanks so much!:)

I think it must be coming from the bottom of the dishwasher. We opened up the bottom tonight to see what we could see, but didn't notice much other than a tiny spot where it looked like something might be melted on the left side, but I have no idea what it could be.