Failed Remote Return Air Sensor (CR)

Remote return air sensor failure preventing accurate zone temperature reading.

Possible causes

Open or short circuit in sensor wiring
Defective temperature sensor
Loose connection at terminal board or controller
Corrosion on remote evaporator connectors

Recommended actions

Verify sensor connection at remote unit
Measure sensor resistance (Ohms) to confirm status
Inspect wire harness for cuts
Replace sensor if values are out of range

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Other Thermo King codes

00No Alarms Exist 02Check Evaporator Coil Sensor (Zone)03Check (Control) Return Air Sensor (Zone)04Check (Control) Discharge Air Sensor (Zone)05Check Ambient Temp Sensor 06Check Coolant Temp Sensor

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