If it is open while cool

Can this board be used for variable speed blower applications

a 1/2" x 3/8" reducer bushing

Key Benefits Precise Flow Control: Maintains proper refrigerant charge levels to prevent liquid slugging and ensure peak compressor efficiency

Internal Safety Shut-off: High-performance dual-seat design provides robust protection against gas leakage when the system is idle

Auburn E5-409B Ignitor 326058-756 If it is open whileThe Auburn E5 409B Ignitor is a high performance industrial spark plug designed for reliable gas burner ignition in demanding HVACR environments. Engineered by Auburn, a leader in combustion components, this M & H ignitor features a durable alumina oxide ceramic insulator for superior dielectric strength and resistance to high temperatures. It is a critical component for ensuring a consistent electrical discharge in industrial furnaces and boilers,