Weil McLain 510-312-019 Limit Control

The Weil McLain 510-312-019 is a high-performance aquastat limit control specifically designed for GV series boilers and related hydronic heating systems. As a critical safety component, this high limit temperature control monitors system water temperatures and provides essential thermal protection by interrupting the burner circuit if temperatures exceed the safe operating threshold. This specific assembly comes equipped with a 1/2 inch NPT immersion well, ensuring a secure, leak-proof interface with the boiler casing while providing high-sensitivity thermal transfer to the internal sensor. For field technicians, the boilers parts replacement process is streamlined by the direct-fit design, maintaining the precise calibration required for Weil McLain hydronic systems. Utilizing a 140-240°F range on similar limit switches, this control is engineered for HVAC safety switch reliability in high-demand residential and commercial applications. Replacing a fouled or unresponsive limit control with this genuine OEM boiler part is necessary to prevent thermal runaway and ensure consistent system cycling.

• Precision Thermal Regulation: Provides accurate high-limit sensing to protect the heat exchanger from overheating conditions.
• Integrated Immersion Well: Includes a factory-matched 1/2" NPT well for rapid response times and easy installation into the tapping.
• System Compatibility: Engineered specifically for Weil McLain GV boilers, ensuring proper electrical integration with existing control boards and wiring harnesses.
• Durable Construction: Built for the rigors of boiler room environments, maintaining calibration despite constant thermal cycling.

• Does this limit control include the well? Yes, the 510-312-019 is a complete assembly that includes the 1/2" NPT immersion well.
• What boiler models are compatible with this part? This part is primarily used in Weil McLain GV series gas-fired boilers; check your specific series manual for part number verification.
• Can this be used as a primary operating control? This is designed as a high-limit safety control; refer to your system's wiring diagram for its specific role in the terminal circuit.

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.