The diagnostic LED indicator facilitates rapid troubleshooting by signaling specific fault codes

This prevents the "knock" or water hammer often associated with fast-acting valves in water lines

or limit trips

This Trane OEM part serves as a critical HVAC system diagnostic solution when troubleshooting hard-starting compressors or overheating fan motors

FM approved

Lochinvar & A.O. Smith 100217965 Pressure Switch 30067439-890 The diagnostic LED indicator facilitatesThe Lochinvar & A. O. Smith 100217965 Pressure Switch is a critical safety component designed for precise monitoring of the combustion air sequence in high efficiency water heaters and boilers. This 2. 3" WC blocked inlet pressure switch functions as a normally open contact that closes when the inducer fan generates the required negative pressure, ensuring the venting system is clear of obstructions before ignition. Engineered for compatibility with