Description DS-B-17A – Burner Control Circuit Board 50310 202012 / 50310-202012 / 50310202012 / 50310 202025 Other Circuit Boards: DAYSTAR Models made before 2004 or older model use a DS-B-17 DAYSTAR Models made from 2013 till present use DS-B-17C KBE5S Models made from 2006/2007 to 2012/13 – WITHOUT OVER VOLTAGE use KSL-B-25B KBE5S Models made from 2006 SN 01J- till 2012/2013 SN 01D – WITH OVER VOLTAGE use a KSL-B-25C KBE5S Models made from 2012/2013 SN 01C-01 till 2017 use KSL-B-25E KBE5S Models made from 2017 SN 01Y till present use KSL-B-25F KBE5L 2-Step Models made from 2010/2011 SN 01F-04 till 2012/2013 SN 01D-03 use KSL-B-25D KBE5L 2-Step made from 2012/13 SN 01D-03 use KSL-B-25E KBE5L 2-Step made from 2017 SN 01Y till present use KSL-B-25F VAL6 is a series of heaters. It is not the model’s name. We suggest you refer to your manual that came with your machine for correct part number.  If you still have questions, you can call our service or parts department at 800-846-5157.