toxic fumes from Kenmore glasstop range oven

[scout]

I have a 2 yr old Kenmore range.  I live alone and use the oven very rarely.  The first time I used it it gave off an obnoxious odor.  I called and a tech came out.  He said it was the 'new' that needed to burn off.  I have only used it 3 or 4 times since for warming up bread.  On Sunday I made a cheesecake, 375 for 50 minutes.  30 minutes into the cook time the toxic fumes drove me out of the kitchen.  My eyes were stinging and watering, I couldn't keep them open.  It was hard to breathe the fumes.  I opened all the windows and doors and turned on all the fans.  After I turned off the oven and looked inside there was a pool of black gunk on the floor of the oven, about 2 cups of it.  After it cooled enough, I wiped out what I could and scraped out that that had hardened.  There is still some in there that I couldn't get out.  I'm afraid to use the oven, I think it is dangerous.  I have no idea where the black stuff came from, there was nothing in or on the walls of the oven when I put the cheesecake in.  What can I do?

Model 790.9641440C

[JWWebster]

is it electric or gas?

[jumptrout51]

Seems to me you have a natural gas oven connected to LP(bottled) gas without proper conversion.

[scout]

is it electric or gas?

It's electric, self cleaning.

[scout]

Seems to me you have a natural gas oven connected to LP(bottled) gas without proper conversion.

  No, it's an electric self cleaning oven.

[theoldstoveguy]

Were the legs installed on this unit? I have seen legs come in the packets, possibly came loose in transit and got stuck in broil element.

[Repair-man]

2 years old? Seldom used?

The last time I took apart a stove like that, I found a ton of mouse droppings in the upper insulation over the  oven cavity. Mice love this area due to the warm insulation and go there to remove bits of it to carry to their nests. In my particular case, they also made nests inside the insulation, so there was a ton of excrement there, and believe me, it will make your nose burn and your eyes water when the oven is turned on. As the oven heats, this stuff melts and seeps into the oven, smelly dark and nasty. I have literally had to replace the entire oven insulation wrapper and hose down the unit outside to remove this kind of infiltration.  I'm not saying yours is this way, but a quick inspection under the main top by a technician who can open the oven  panels up will suffice.

This oven was used by a 80 year old lady who seldom cooked herself a meal anymore, only for holidays when the grandkids come.