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This specific model is a natural gas fast-open valve
The most common causes for a limit switch lockout include excessive scale buildup on the sensing bulb
it offers true OEM harness auto-detection
alongside a remote electrical component box for flexible mounting
continuous blower operation
Weil McLain 511-724-253 Thermocouple 340155-7024 This specific model is aThe Weil McLain 511 724 253 Thermocouple is a task specific 48 inch push in thermocouple designed for high performance flame sensing in residential gas boilers and standing pilot systems. Engineered as a genuine OEM replacement part, this 48" lead ensures reliable millivolt signal transmission to the gas valve, maintaining the safety loop in LP (Propane) and Natural Gas configurations. When troubleshooting a pilot that will not stay lit or a burner