115 Probe Error (Check Alarm)

Thermo King Alarm Code
Description Corrective Action
Probe Error (Check Alarm)
  • Occurs during Pretrip (PTI) test or Probe Test failed in Chilled mode
  • Temperature difference between return air and evaporator coil sensors is too high (1.5 C [2.7 F] difference maximum)
  • Check sensor connections. Check sensor resistance of each sensor. Resistance must be 2,000 ohms at 25 C (77 F).
  • Check left hand and right hand supply air sensor locations.

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