The Lennox 56W22 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers

preventing furnace pressure switch trips and inducer motor housing saturation

and non-condensable gases

This specific model is designed for Aaon E-BUS controllers

Common Questions What is the connection size for this service valve

Itron-Actaris 757623 Orifice 319848-301 The Lennox 56W22 Limit SwitchThe Itron Actaris 757623 Orifice is a high precision 1 4" dia aluminum orifice engineered specifically for technical flow regulation in series B42 and B42R gas regulators. As a veteran technician knows, selecting the correct gas regulator orifice size is non negotiable for system safety and efficiency. This component maintains a maximum inlet pressure rating of 60 PSIG, making it a critical part for mid range commercial and residential gas service