Lochinvar & A.O. Smith 100173054 Inlet Sensor Freon A reading of infinity indicates

A reading of infinity indicates a cracked or failed element

If you observe sparking along the length of the wire rather than at the electrode

restoring normal furnace operation without manual intervention

For applications requiring a return-to-zero safety position

The S1-025-26366-004 is an automatic reset control

Lochinvar & A.O. Smith 100173054 Inlet Sensor Freon A reading of infinity indicatesThe Lochinvar & A. O. Smith 100173054 Inlet Sensor is a critical NTC thermistor engineered for precise temperature monitoring in high efficiency commercial water heaters and hydronic boilers. This sensor, which is cross compatible and functionally identical to WRE2145, monitors the incoming water temperature to provide real time data to the control module. This allows the system to modulate the firing rate accurately, maintaining a stable delta T