always replace the 47-21900-13 with the exact specified manual reset component

professional finish on every service call or retrofit project

making it a standard choice for commercial water systems and large-scale irrigation applications

ensuring a longer service life in high-cycle commercial HVACR applications

Weil McLain 383-500-055 Sensor Kit Els PW 17895 always replace the 47-21900-13 withIdentify 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