Amana Air Command 80 SSE + White-Rogers 50A50-288, No Blower on Auto

[Gthoffman]

In searching this forum, I found a similar (but much older) post that asks this question.  I have the equipment mentioned in the title, but my blower fan does not kick on during Auto cycling.  When the fan setting is On, I get heat, but obviously the blower runs 24/7 and is costing me big.  The controller turns on the igniter, but the blower is never activated.  Is my problem as simple as replacing the controller, or am I missing a bad sensor somewhere?  Thoughts on how to diagnose?  Thanks!

[jumptrout51]

Check the FLS on the heater.
FLS= fan limit switch.