If there is no Event Goal specified, the thermometer will not progress.

To correct this:

1. Go to Communities > Special Events > Friends Asking Friends > Kintera Thon
2. Hover over your event's name and click Website Info
3. Click on Event Information, in the Required Items section
4. Check the Event Goal field in this page.  If empty or 0, provide a goal
5. Click Save
6. Go back to the Website Info page for this event
7. Click Publish This Event Now

Check the front page of your event.  The thermometer should now fill appropriately.

If not, please chat with Support and reference this article.