Trane SEN1809 Temp Sensor 318518-761 The 24A34-2 is a 1-switch

The 24A34-2 is a 1-switch sequencer

Direct OEM Compatibility: Verified for Raypak MVB boilers and high-output heaters to prevent control board "FAN" error codes

Common indicators include visual cracks in the heat exchanger tubes

The unit features a 3-inch stainless steel thermostat probe

making it ideal for demanding HVACR ignition systems

Trane SEN1809 Temp Sensor 318518-761 The 24A34-2 is a 1-switchWhen you're troubleshooting a lockout or erratic discharge air temperature on a Trane or American Standard unit, a failing thermistor is often the culprit. The Trane SEN1809 is a genuine OEM thermistor temperature sensor designed specifically for a 3 4" tube mount. This NTC (Negative Temperature Coefficient) sensor provides high accuracy resistance feedback to the control board, ensuring the system maintains precise setpoints and avoids coil freeze