Weil McLain 383-500-602 Temp Sensor Simplified Maintenance: Fully disposable oil

Simplified Maintenance: Fully disposable oil filter design eliminates the need for messy housing cleanouts and chemical treatments

This kit is specifically engineered for a range of Heil Quaker

preventing leaks while ensuring high thermal conductivity for precise response times

significantly extending the service life of the tank lining in harsh water conditions

the switch is likely stuck open and requires replacement

Weil McLain 383-500-602 Temp Sensor Simplified Maintenance: Fully disposable oilThe Weil McLain 383 500 602 is a critical return supply temperature sensor kit engineered for precise thermal monitoring within Weil McLain Ultra and SlimFit series boilers. This 12 Kohm NTC thermistor assembly provides real time data to the control board, allowing for accurate modulation and preventing short cycling. As a dedicated boiler replacement part, it ensures the system maintains the delta T required for high efficiency condensing operation.