Weil McLain 383-500-643 LWCO-H 24V Low Water Cut-Off Probe

Description

Weil McLain LWCO-H 24V Probe — Reliable Low Water Protection for Hydronic Boilers

The Weil McLain 383-500-643 is a probe-type Low Water Cut-Off (LWCO-H) control designed to protect hydronic boilers from the hazards of low water conditions. Operating at 24V, this OEM replacement probe integrates seamlessly with compatible Weil McLain boiler systems, ensuring the burner is shut down before dangerously low water levels can cause heat exchanger damage or system failure.

Key Features

• Probe-type low water cut-off (LWCO-H) design for accurate water level sensing
• 24V operating voltage for compatibility with modern Weil McLain boiler controls
• OEM replacement part — engineered to Weil McLain specifications for reliable fit and function
• Protects boiler heat exchanger from dry-fire damage caused by insufficient water levels
• Designed for use in hydronic heating systems
• Direct SKU replacement: 383-500-643

Application

This LWCO probe is intended for use with Weil McLain boilers that require a 24V probe-style low water cut-off. It is a critical safety component that monitors boiler water level and interrupts burner operation when water drops below a safe threshold, preventing costly damage and ensuring safe system operation.

Why Choose OEM Weil McLain Parts?

Using genuine Weil McLain replacement components ensures proper system compatibility, maintains warranty integrity, and delivers the performance reliability that installers and building owners depend on. Always verify compatibility with your specific Weil McLain boiler model before installation.