Carrier 321702-401 Barrier 30067439-890 it is best practice to

it is best practice to install the sensor in an area where the media flow is consistent

including central furnaces

This HVAC expansion valve is built to handle the specific pressure-temperature relationship of R-22 refrigerant

though a multimeter is recommended to verify proper voltage input and output across the terminal block during commissioning

This fault usually indicates that the temperature sensor is no longer providing a signal that aligns with its calibrated range

Carrier 321702-401 Barrier 30067439-890 it is best practice toThe Carrier 321702 401 Barrier is an OEM part for use with various Carrier Bryant models. It is ideal to create a barrier between the corrosion causing elements and the coil. This barrier ships out factory direct to ensure best in class quality. Use this low voltage barrier to replace worn out or damaged barriers.