Product Filters Not Showing Up

my product filters not showing up it did work yesterday but today its not working how do i check everything to go back to the default on the filters ? my site is smallenginechainsawparts.com

It is hard to say without detailed examination.

- make sure that product features are active and corresponding categories are specified for the correctly

- make sure that filters created by these features are active

- make sure that the block with filters is active on the Category layout page