Weil McLain 510-300-014 Spill Switch

Replacing a tripped or faulty Weil McLain 510-300-014 is a standard safety procedure for service technicians maintaining Weil McLain CGa, CG, and CGx gas boilers. This 240F Spill Switch M/R is a critical safety control mounted on the draft hood to detect flue gas spillage caused by chimney blockages or downdraft conditions. As a manual reset spill switch, it is designed to break the safety circuit and lock out the boiler once temperatures reach the 240-degree setpoint, forcing a technician to inspect the venting system before a restart. This OEM component, also identified as 510300014WT, is a direct-fit replacement for spark-ignited and standing pilot residential units. When troubleshooting a boiler not firing, testing for continuity across the switch terminals while the reset button is depressed is a priority. Using the 240F rated spill switch 510-300-014 ensures the system meets the original manufacturer's specifications for thermal protection and prevents nuisance tripping common with lower-rated substitutes.

• OEM Compatibility: Exact replacement for Weil McLain part numbers 510-300-014 and 510300014WT, ensuring seamless integration with existing safety circuits.
• High Thermal Sensitivity: Precision-calibrated to trip at 240°F (115°C) to protect against unsafe flue gas discharge.
• Manual Reset Mechanism: Incorporates a standard reset button that requires a physical check of the venting system, preventing automatic restarts under hazardous conditions.
• Durable Construction: Built with industry-standard materials to withstand the high-heat environment of the draft hood assembly.

Is the 510-300-014 interchangeable with the 210F spill switch?
No. Each Weil McLain boiler model is specified for a specific temperature setpoint. Installing a 240F switch where a 210F is required could delay safety shutdowns, while installing a 210F where a 240F is required will lead to frequent nuisance trips.

Do the wiring leads have polarity?
The leads for this spill switch do not have polarity; they can be connected to either terminal on the switch to complete the safety loop.

What causes this switch to trip frequently?
Frequent tripping is typically an indicator of a venting issue, such as a blocked chimney, bird nest obstruction, or severe downdrafts. Always inspect the flue before resetting.

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.