Resetting the High Limit Reset Switch -- To Fix Problem of No Electric Backup Heat

It's a simple fix, and its the cause of 80% of no electric backup heating complaint.   

If electricity scares you, turn off power at the breakers, or at the timer box.

You only need a Phillips head screwdriver

Push the reddish button and pay close attention for a small click.    If you get a click, it was tripped and should now be fixed.