Lennox 18M63 Pressure Switch 321042-401 this assembly features a normally

this assembly features a normally open (NO) configuration with a 4

Does this include the necessary gaskets or mounting hardware

Its universal mounting capability ensures that technicians can quickly swap out failed components in furnaces

Visual Verification: Integrated LED indicator provides immediate status of the relay coil for faster commissioning and troubleshooting

This model is the direct replacement for FSLF120-FC

Lennox 18M63 Pressure Switch 321042-401 this assembly features a normallyThe Lennox 18M63 Pressure Switch is a high precision, two stage OEM furnace part specifically engineered for compatible Lennox, Armstrong, and Ducane heating systems. This dual action component provides critical monitoring of combustion air pressure, ensuring the inducer fan maintains the proper venting required for safe ignition and continuous high efficiency operation. With fixed set points of 0. 20" WC and 0. 45" WC, this switch accurately