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the switch internal diaphragm or contacts have likely failed
Key Benefits: Restores Flow Accuracy: Eliminates short-potting and overflow issues by resetting the internal plunger and spring tension
Automatic Reset: Eliminates the need for manual intervention by restoring circuit continuity once temperature returns to the safe 175-225 degree Fahrenheit range
Is professional calibration required during installation
Non-Linting Design: Features an aerated pilot secondary air intake that prevents lint buildup
Weil McLain 383-500-601 Temperature Sensor the switch internal diaphragm orAs a seasoned technician, you know that keeping a hydronic system in check starts with reliable data feeding into the control module. The Weil McLain 383 500 601 is a high precision system temperature sensor designed as a direct replacement component for Ultra Gas and commercial boiler units. This 12k Ohm resistance NTC sensor provides the real time thermal feedback required for proper mod con operation, ensuring the boiler control module can