Daikin | Heat Reclaim Ventilator

Error Code 65

Troubleshooting guide for the Daikin Heat Reclaim Ventilator system fault 65.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.

System Diagnosis

Malfunction of outdoor air thermistor (Heat reclaim ventilator)

Potential Causes & Solutions

  • Defective connector contact.
  • Defective outdoor air thermistor.
  • Defective control PCB.

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