Weil McLain 383-500-300 Sensor Integrated Safety: Includes a factory-installed

Integrated Safety: Includes a factory-installed bleed resistor to prevent arcing and extend the life of the potential relay or centrifugal switch

The 512-200-077 is designed for AHE

you must use the specified SPDT part to maintain sequence logic

What causes an ignitor electrode to fail prematurely

Common Questions What are the signs of a failing R44992-001 Sensor Ignitor

Weil McLain 383-500-300 Sensor Integrated Safety: Includes a factory-installedThe Weil McLain 383 500 300 is an OEM spec Return Supply Water Sensor designed for precision temperature regulation within hydronic systems. Engineers and technicians primarily utilize this 12k ohm NTC thermistor kit for Weil McLain Ultra Series boilers, specifically supporting Ultra Gas Boiler models such as the Ultra 310 and Ultra 80 (Series 1 & 2). By delivering real time data to the U Control module, it allows the unit to modulate firing rates