Weil-McLain 381330040 Control Module

Weil-McLain 381-330-040 Control Module – Designed for CGi Series 4 Boilers

The Weil-McLain 381-330-040 Control Module is an OEM replacement part engineered for use with CGi Series 4 gas boilers. This module manages ignition, flame sensing, and operational safety, ensuring consistent performance and compliance with modern heating system standards.

Built with durable components and precision control logic, this module is essential for maintaining system reliability and extending the service life of Weil-McLain CGi Series 4 boilers in residential and light commercial applications.

Key Features

• OEM Replacement – Manufactured for compatibility with Weil-McLain CGi Series 4 boilers.
• Integrated Safety Controls – Provides flame sensing and automatic shutdown in unsafe conditions.
• Durable Circuit Design – Built to withstand continuous heating system operation.
• Streamlined Integration – Pre-configured for plug-in installation with designated boiler models.
• Reliable Performance – Maintains system efficiency while ensuring proper ignition sequence.

Technical Specifications

• Part Number: 381-330-040
• Application: Weil-McLain CGi Series 4 boilers
• Voltage: 120 VAC
• Weight: Approx. 2.5 lbs
• Dimensions: 6" x 4" x 2"

Installation Considerations

Installation of this control module should be performed by a licensed HVAC or plumbing professional. Proper setup requires verification of wiring connections, grounding, and safety circuit integration to ensure compliance with local codes and manufacturer specifications.

Contractor Notes

For Professional Installers: This module is designed to meet job site requirements, reducing troubleshooting time and restoring boiler operation quickly. Its OEM compatibility minimizes call-backs by ensuring reliable ignition and safety control functions.

For System Maintenance: Replacement of the control module should include inspection of wiring harnesses, sensors, and grounding to ensure long-term performance.

Summary

The Weil-McLain 381-330-040 Control Module provides the essential electronic controls for CGi Series 4 boilers, supporting both safety and efficiency. With its OEM design and reliable operation, it is the correct choice for contractors performing service, repair, or maintenance on these systems.