Resideo Combustion controller S4960A1008U

The Resideo Combustion controller S4960A1008U is an automatic control unit for gas burners and boilers, managing ignition, flame monitoring, and system sequencing. It supports flame detection via ionisation, UV, and IR methods. This controller ensures safe burner start-up and gas shut-off in emergencies. It replaces the discontinued S4560A1008 model.

Parts of this type are selected by exact series and type designation, supply voltage, safety and pre-purge times, flame detection method (ionisation, UV, or IR), and base or plug pattern. Verify that the replacement matches the original's safety time and flame detection method. Controls within the same brand are normally not interchangeable across series; a mismatched safety time creates a safety hazard.

When a control box of this kind fails, the burner may fail to ignite, lockout on flame loss, or shut down unexpectedly. Check for proper interaction with pressure switches, ignition transformer, and fuel valve. Faulty controls may prevent flame proving or cause repeated lockouts.