04
Thermo King
Warning

Check (Control) Discharge Air Sensor (Zone)

Failure of the discharge air sensor, which measures the air leaving the evaporator toward the cargo.

Possible causes

  • Defective discharge sensor
  • Ice buildup on evaporator affecting sensor
  • Poor electrical connections

Recommended actions

  • Inspect sensor at the evaporator outlet
  • Check for ice obstructions
  • Check wiring continuity to the controller

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