the internal seat may be fouled with debris

it ensures full compatibility with specific furnace series

or inconsistent motor speed modulation

Why is my water heater's high-limit switch tripping frequently

Superior Radiant VE007 Pressure Switch 318423-701 the internal seat may beThe Superior Radiant VE007 Pressure Switch is a critical safety component engineered for infrared tube heaters and high performance HVAC pneumatic systems. As a veteran grade differential air pressure switch, the VE007 is designed to verify proper blower operation and vent airflow before allowing the ignition sequence to commence. This OEM pressure switch features a rugged diaphragm and precise electrical contacts to ensure a reliable differential