IGNITION CONTROL CIRCUIT BOARDFor Suburban Furnace Models SF 20QT SF 25QT SF 30QT SF 35QT SF 42QT SF 20FQT SF 25FQT SF 30FQT SF 35FQT SF 42FQT SFV 20QT SFV 25QT SFV 30QT SFV 35QT SFV 42QT SFV 20FQT SFV 25FQT SFV 30FQT SFV 35FQT SFV 42FQT SF 20VHQT SF 25VHQT SF 30VHQT SF 35VHQT SF 20VHFQT SF 25VHFQT SF 30VHFQT SF 35VHFQT SF T Replacement Cores; With 521099 Board And Rewiring Instructions