551
Thermo King
Warning

Battery Charger Internal Temp Sensor Fault

Fault in the sensor monitoring the internal temperature of the battery charger.

Possible causes

  • Defective internal thermistor
  • Sensor connector loose on the main board
  • Cold solder joint on the control circuit

Recommended actions

  • Inspect internal charger connections
  • Clean connectors with contact cleaner
  • Replace control board or complete charger

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