Robertshaw 780U-DS20 Ignition Module Refrigerant this furnace relay S1-024-11772-700 is

this furnace relay S1-024-11772-700 is the primary diagnostic check for continuity

System Efficiency: Restores the factory-rated airflow and combustion seal to protect heat exchangers from localized overheating

5-ton AC units and heat pumps

Durable Mounting: Includes flanged head screws and a low-profile housing designed for outdoor environment exposure and north-face installation

25A Fixed Threshold: Ensures sensitive detection of status for low-draw equipment and failing belt drives

Robertshaw 780U-DS20 Ignition Module Refrigerant this furnace relay S1-024-11772-700 isRobertshaw 780U DS20 is a universal direct spark ignition (DSI) control module designed for gas fired HVAC equipment, including furnaces, boilers, and rooftop units. This ignition control is used to safely manage burner ignition sequences by providing timed spark ignition and flame sensing for reliable system startup and operation. The module is commonly used as a replacement ignition control in systems requiring a universal solution for direct spark