utilizing the genuine Resideo 392449-4 ensures compatibility with brass pilot gas lines and prevents the common mechanical failures associated with generic sub-components

Key Benefits Dual-Stage Modulation: Enhances energy efficiency and shortens warm-up times by switching between low and high heating outputs

A veteran technician should inspect this gasket whenever the chamber face plate is pulled

When diagnosing a pressure switch stuck open or closed error code

Lochinvar & A.O. Smith 100233301 Switch R-407C utilizing the genuine Resideo 392449-4The Lochinvar & A. O. Smith 100233301 Switch is a critical fixed setting Normally Open (N. O.) air pressure switch designed for negative pressure sensing applications in high efficiency venting systems. Calibrated specifically to 1. 25" WC, this OEM component serves as a primary safety proving switch, ensuring the combustion blower is generating sufficient draft before the ignition sequence initiates. For veteran technicians, this 100233301 pressure