Weil McLain 383-500-055 Sensor Kit Els PW 17895 The 180°F setpoint is factory-calibrated

The 180°F setpoint is factory-calibrated and cannot be adjusted in the field to ensure operational integrity

ensure you retain your existing orifices or match the orifice size to your local elevation and gas type (Natural or LP)

designed to withstand the high-heat cycles of modern furnaces and boilers

Check your data plate or service manual for part number 1779405 or 1779405P to confirm the 1779405PS is the correct match

Hermetic Construction: The welded refrigeration valve design removes the risk of external leaks commonly associated with flared or gasketed components

Weil McLain 383-500-055 Sensor Kit Els PW 17895 The 180°F setpoint is factory-calibratedIdentify and resolve lockout conditions with the Weil McLain 383 500 055 Flue Temp Sensor Kit. Designed for Weil McLain Ultra Series 1 and 2 residential gas boilers, this genuine OEM replacement part is essential for monitoring exhaust gas temperatures and maintaining high efficiency performance. When a flue temperature sensor fails or provides erratic resistance readings, the boiler control module typically triggers a safety shutdown to prevent heat