Daikin Heat Reclaim Ventilator

Daikin Heat Reclaim Ventilator Error Code CA

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

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What It Means

Malfunction of discharge air thermistor.

Possible Causes

  • Defective thermistor for discharge air.
  • Defective indoor unit PCB.
  • Defective connector contact.

Not sure which one it is — or if it's none of these? Try ACLogics today.

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.
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Full Diagnosis

Malfunction of discharge air thermistor

All Recorded Causes

Defective thermistor for discharge air Defective indoor unit PCB Defective connector contact

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and heat reclaim ventilator context before acting on a generic code description.
  2. Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since defective thermistor for discharge air.
  3. Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm defective indoor unit PCB.
  4. After the correction, run the system long enough to confirm the heat reclaim ventilator fault does not return under normal load.

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