Oven will not bake, but broil works

Question

When I turn on my Maytag MGR 5880 BDS using the "bake" function, everything looks ok on the display, however the temp. never rises above 100. I've tried "bake" and "convect", and neither one work. "Clean" doesn't work either. The oven will lock, and display shows that it's heating up, but temp. never rises.
However....."broil" feature works just fine.
Please help.
Thank you