What It Means
Malfunction of discharge air thermistor.
Daikin Packaged Unit
Daikin Packaged Unit Error Code CA
Troubleshooting guide for the Daikin Packaged Unit system fault CA.
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.
New to this code? Click to see why this happens
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
- Confirm the exact Daikin model family and packaged context before acting on a generic code description.
- Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since defective thermistor for discharge air.
- Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm defective indoor unit PCB.
- After the correction, run the system long enough to confirm the packaged fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Packaged Unit diagnostics step-by-step — so you confirm the cause before swapping parts.
