Check Air Flow (Zone)

Restriction detected in evaporator airflow in the indicated zone.

Possible causes

Excessive ice buildup on evaporator
Cargo load obstructing fans
Evaporator fans spinning slowly or stopped
Damaged or blocked air ducts

Recommended actions

Perform manual defrost cycle
Verify cargo arrangement in trailer
Inspect fan belts and motors
Check differential pressure sensors if applicable

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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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