Daikin-McQuay 4018364 Thermister Assembly 321894-706 The Schneider Electric ETI500-4 is

The Schneider Electric ETI500-4 is a precision 4-inch immersion temperature sensor designed for accurate fluid monitoring in heavy-duty HVACR hydronic systems

The Class F rating indicates the motor can handle higher internal temperatures (up to 155°C)

Using this valve with propane will lead to combustion instability and safety risks

or if the switch fails to close consistently at the 130°F reset point during troubleshooting

Daikin-McQuay 4018364 Thermister Assembly 321894-706 The Schneider Electric ETI500-4 isThe Daikin McQuay 4018364 Thermister Assembly is a high precision HVAC temperature sensor engineered for critical environmental monitoring in commercial and residential heat pump systems. As a genuine OEM replacement part, this thermistor assembly ensures seamless integration with control boards to mitigate inaccuracies that lead to short cycling or inefficient compressor operation. Built to rigorous Daikin McQuay engineering standards, the 4018364