"David Cook" wrote in message
...

Over the past month, the oven was taking longer and longer
to pre-heat, and now it does NOT heat up at all, when
the function switch is set to BAKE. The bottom element
does not get hot at all now.


I'd suspect the heat element based on that description.

You are correct in that the bottom element only is used for the 'bake'
setting, and the top only is used for 'broil'.