CERTIFICATION PURSUANT TO RULE 30A-2(B) UNDER THE 1940 ACT AND SECTION 906
                           OF THE SARBANES-OXLEY ACT

I, James A. Bowen,  Chairman of the Board,  President and Chief Executive
Officer of First Defined  Portfolio Fund, LLC (the "Registrant"), certify that:

         1.     The Form N-CSR of the Registrant  (the "Report")  fully complies
                with  the   requirements  of  Section  13(a)  or  15(d)  of  the
                Securities Exchange Act of 1934, as amended; and

         2.     The information  contained in the Report fairly presents, in all
                material  respects,  the  financial  condition  and  results  of
                operations of the Registrant.


Date:    AUGUST 31, 2007             /S/ JAMES A. BOWEN
     ----------------------          -------------------------------------------
                                     James A. Bowen, Chairman of the Board,
                                     President and Chief Executive Officer
                                     (principal executive officer)


I, Mark R. Bradley,  Treasurer,  Controller,  Chief Financial  Officer and Chief
Accounting  Officer  of First  Defined  Portfolio Fund, LLC (the  "Registrant"),
certify that:

         1.     The Form N-CSR of the Registrant  (the "Report")  fully complies
                with  the   requirements  of  Section  13(a)  or  15(d)  of  the
                Securities Exchange Act of 1934, as amended; and

         2.     The information  contained in the Report fairly presents, in all
                material  respects,  the  financial  condition  and  results  of
                operations of the Registrant.


Date:    AUGUST 31, 2007            /S/ MARK R. BRADLEY
     ----------------------        ---------------------------------------------
                                    Mark R. Bradley, Treasurer, Controller,
                                    Chief Financial
                                    Officer and Chief Accounting Officer
                                    (principal financial officer)