Lochinvar & A.O. Smith 100111329 Relay Switch 320788-703 Loud humming often indicates loose

Loud humming often indicates loose mounting or a secondary circuit overload that's drawing more than the rated 1

it may have internal resistance or mechanical fatigue and requires replacement

Proven Performance: Provides a mechanical interlock to ensure the burner only fires when the damper is in a fully open position

this component provides the exact orifice calibration required for Lennox air handlers and heat pumps

reliability and precise control over airflow are non-negotiable

Lochinvar & A.O. Smith 100111329 Relay Switch 320788-703 Loud humming often indicates looseThe Lochinvar & A. O. Smith 100111329 Relay Switch is a critical OEM 24 VAC control component engineered for high recovery commercial water heaters and hydronic boiler systems. This genuine relay replacement manages the sequential activation of heating elements and integrates seamlessly with the Smart System control panel to maintain precise water temperature setpoints. Designed for heavy duty cycling, the 100111329 relay facilitates power