Fenwal 35-70 is a 120 VAC direct spark ignition device for controlling a gas valve, monitoring flame and driving a combustion blower to ignite LP and natural gas. Highlighted by on-board diagnostics with LED output for safe, efficient burner operation and easy troubleshooting, the unit offers versatility through a variety of standard features including three enclosure configurations, two wiring options, two flame sense options, two reset options and six ignition try options.