Model compatibility has not been independently verified
Earlier archive data contained suggested model or series names. Without a clear model/code table in a manufacturer manual, these names are no longer displayed as verified matches.
This is general brand/device guidance; check the model label and official manual.
Open manufacturer sourceWhat does this code mean?
The Daikin ATXC-B operating manual defines H0 as “Compressor sensor system error”. This identification applies to the ATXC20/25/35/50/60/71BV1B family and may differ on other series.
Verified against the Daikin ATXC-B operating manual for ATXC20BV1B, ATXC25BV1B, ATXC35BV1B, ATXC50BV1B, ATXC60BV1B, ATXC71BV1B. Other series may use the same code differently.
Read official manufacturer referenceWhat can you try safely?
Only follow steps approved for your specific model; stop if the fault indicates an unsafe condition.
- 01
Verify the exact displayed code and model
Photograph the exact error code and the indoor unit model label. This definition is documented for the ATXC-B model family, not every Daikin air conditioner.
How to interpret the result: Do not use a code definition for a different model.
- 02
Stop unsafe operation
Stop forcing operation if the error repeats. If there is a burning smell, smoke, visible electrical damage or unusual noise, switch off safely and request service.
How to interpret the result: Stop immediately if there is smoke, an electrical fault or a leak.
- 03
Try the safe external check
Check only the user-accessible air filter and obvious airflow obstruction; do not unplug thermistors or remove control panels.
How to interpret the result: This check may not repair an internal component.
- 04
Evaluate whether repair is needed
If the code persists, stop using the unit and provide the model and code to a qualified technician. Do not guess which part to replace.
How to interpret the result: If the fault repeats, specialist diagnosis is required.
How is the fault resolved?
User-accessible checks
- Stop forcing operation if the error repeats. If there is a burning smell, smoke, visible electrical damage or unusual noise, switch off safely and request service.
- Check only the user-accessible air filter and obvious airflow obstruction; do not unplug thermistors or remove control panels.
- If the code persists, stop using the unit and provide the model and code to a qualified technician. Do not guess which part to replace.
Professional diagnosis and repair
A technician tests the thermistor circuit, wiring and controller input to model specifications, repairing only the verified fault.
How to verify success: The error should no longer recur during normal operation. If it does, stop repeated attempts and request model-specific help.
Important: Do not open live electrical assemblies, pressure/refrigerant lines, heater or rotating components. Unauthorized repairs may affect warranty coverage, depending on the applicable warranty terms and law.
Why can this happen?
The Daikin ATXC-B operating manual defines H0 as “Compressor sensor system error”. This identification applies to the ATXC20/25/35/50/60/71BV1B family and may differ on other series.
- Manufacturer identifies a system condition, not necessarily a failed part.
- Model and operating circumstances affect the cause and proper repair.
Is this code valid for your appliance?
Verified against the Daikin ATXC-B operating manual for ATXC20BV1B, ATXC25BV1B, ATXC35BV1B, ATXC50BV1B, ATXC60BV1B, ATXC71BV1B. Other series may use the same code differently.