Product review (5 stars): used in a mobil home heater
This did not match exactly.  It is more reversed for what my heater needed, but if you study the diagram and need a 3 sequence unit this should work.

in the picture and description it showed extra connectors, mine did not come with that.  But radio shack sells them and for us it was cheaper and faster then trying to redo this.

This revived the old heater and has been working great for the last couple of months.