Weil McLain 511-330-086 Module

The Weil McLain 511-330-086 is a critical pilot proving module engineered specifically for technical integration within Weil McLain LGB boilers. Known by its United Technologies manufacturing designation U-T 1003-615, this intermittent pilot control manages the essential sequence of operation by verifying a stable pilot flame before energizing the main gas valve. For technicians troubleshooting ignition lockout or inconsistent firing on cast iron sectional boilers, this OEM Weil McLain replacement part offers the precise microamp flame sensing required to interface with high-output gas trains. Built as a direct-fit HVAC ignition module, it replaces worn-out or failed pilot controls to resolve common issues like "spark but no flame" scenarios and nuisance safety shutdowns. The rugged electronic components are designed for high-duty cycle industrial and commercial heating applications where maintaining narrow tolerance flame signals is mandatory for system safety and fuel efficiency.

• Ensures accurate pilot flame sensing to prevent the main burner from opening during unsafe conditions.
• Direct OEM replacement for Weil McLain 511-330-086 and United Technologies 1003-615.
• Compact intermittent pilot ignition control design simplifies mounting in busy control cabinets.
• Compatible with Weil McLain LGB series gas-fired boilers used in steam and hydronic systems.
• Robust 24VAC circuitry stabilizes flame rectification signals to minimize lockout callbacks.

• How do I troubleshoot a system that sparks but won't prove the pilot? First, verify the flame sensing rod is clean and positioned correctly in the pilot flame. If the rod is good and the grounding is secure, the Weil McLain pilot proving module may be failing to process the microamp signal.
• Can I use this 1003-615 module for other Weil McLain series? This specific part number is primary for the LGB series. Always cross-reference the wiring schematic in your boiler’s control supplement to ensure compatibility with your specific gas valve and burner assembly.
• What does the 'U-T' stand for in the part description? This indicates the original manufacturer is United Technologies, the primary supplier of these electronic ignition controls for Weil McLain systems.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.