Bard 8408-044BX Return Air Sensor / Suction Sensor 10K Ohm Thermistor

The Bard 8408-044BX return air sensor, also called a return air temperature sensor or suction sensor, is a genuine Bard replacement thermistor. It is used with Bard wall-mount HVAC units such as the Fusion-Tec and Multi-Tec series. The unit's controller reads the return air temperature from this sensor. In stand-alone (orphan) mode, the controller uses that reading to stage cooling, heating and economizer operation.

Key Features:

• Bard part number 8408-044, listed in Bard service literature as a return air sensor / suction sensor
• 10K ohm temperature-sensing thermistor
• Resistance changes with temperature along a published temperature/resistance curve (Bard "J" curve) for accurate readings and troubleshooting
• Gives the controller return air temperature data to manage cooling and heating stages and to trigger return air temperature alarms
• Direct OEM replacement for a failed or out-of-range sensor

Replacing a faulty return air sensor helps the unit control temperature accurately and avoids false return air alarms. Check the sensor's resistance against the temperature/resistance table in the Bard service manual to confirm it is working.