Common Questions Does the T-4000-611 include the thermostat

diaphragm actuators in the MK-48XX family

Combustion Precision: Includes factory-calibrated LP conversion orifices to maintain proper air-to-fuel ratios

Industrial Build Quality: High-tolerance construction minimizes mechanical play in the linkage

Weil McLain 511-330-192 Flame Sensor Els PW 17895 Common Questions Does the T-4000-611Installing a genuine Weil McLain 511 330 192 Flame Sensor is the only way to ensure the combustion control circuit on your high efficiency boiler remains reliable. As a critical safety component, this Weil McLain OEM flame sensor provides the necessary microamp signal to the White Rodgers ignition control, confirming the presence of the main burner flame. Without an accurate signal, the system will trigger a safety lockout, often resulting in common