Trane RLY02807 Relay Switch This is an O.E.M. authorized part Fits various Trane models OEM Part Number RLY02807 This is a Trane replacement part Part Number RLY02807 This is an O.E.M. part Compatible with models AHCB0251AAA0, AHCB0251AFA0 and AHCB0301AAA0 Compatible with models TCC042F100BA, TCC042F100BB and TCC042F100BC Compatible with models WCH024B100AA, WCH024B100AB and WCH024B100AC