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Fenwal 35-705701-505 is a 120VAC direct spark ignition (DSI) control -- microprocessor-based design for standard HVAC ignition systems, with LED diagnostic status output.
Fenwal 35-705701-505. Also cross-referenced as NBK-20301.
You'll receive the OEM part or a warrantied, direct-fit equivalent that meets or exceeds OEM spec.