Ingersoll Rand 47728338001 High Air Temperature Shutdown Switch
Alternate Part Numbers: 47728338001, 23681604, 22275879
47728338001 is a high air temp shutdown switch. This item sends a signal to the compressor to shut down the compressor when the air/oil temperature gets too hot.
This switch shuts down the unit to prevent the rotary screw compressor from overheating. Many times this is due to the thermal valve overheating and not letting the oil flow through the cooler. If your cooler is not warm and the compressor continues to shut down intermittently, we would recommend replacing the thermal valve. Item numbers 22463368 and 22282024 are the most common thermal valves that were paired with this HAT switch. Please contact our parts department if you would like confirmation on the correct valve to fit your IR compressor.
This item is commonly known as the HAT switch or temperature switch. It threads into the airend/sump next to the separator and has wires that trace back to the electrical panel.