This is usually caused by low voltage to the 24Vdc coil or debris trapped between the plunger and the tube head

When troubleshooting furnace control board wiring

ensuring the unit responds correctly to specific leak rates

5 to 3 ton capacity range

BASO RSDA95A-120C Solenoid Coil 30067439-890 This is usually caused byThe BASO RSDA95A 120C is a professional grade 120V AC replacement solenoid coil specifically engineered for high demand Baso gas valve series. This potted solenoid coil provides superior environmental protection, ensuring stable impedance and consistent magnetic flux in heavy duty commercial and industrial burner applications. Designed for a direct fit, it operates at 50 60 Hz with a Precise 10. 5 VA power draw, making it the standard HVAC replacement