What It Means
Malfunction of room temperature sensor or humidifier unit damper.
Daikin Split & Multi-Split
Daikin Split & Multi-Split Error Code H1
Troubleshooting guide for the Daikin Split & Multi-Split system fault H1.
Possible Causes
- Defective limit switch.
- Defective damper.
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 room temperature sensor or humidifier unit damper
All Recorded Causes
Defective limit switch Defective damper
Verify Before Replacing Parts
- Confirm the exact Daikin model family and split/ multi split context before acting on a generic code description.
- Confirm filter condition, blower operation, and coil cleanliness before replacing any controls — start by ruling out whether defective limit switch.
- Measure airflow-related readings that match the symptom, such as temperature split or static pressure, and check whether defective damper.
- After the correction, run the system long enough to confirm the split/ multi split fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Split & Multi-Split diagnostics step-by-step — so you confirm the cause before swapping parts.
