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

The NEMA 4X enclosure provides superior protection against corrosion and environmental ingress in demanding mechanical rooms

preventing erratic system behavior or contact welding under standard inductive loads

System Protection: Prevents condenser fan motor failure and compressor slugging by managing ice accumulation during heating mode

eliminating the need for shaft modifications or field adjustments during installation

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