Model/code match: manufacturer PDF evidence recorded
This model and code combination is linked to a manufacturer PDF reference. The match does not extend to other models automatically.
Documented model(s): ATXC20BV1B, ATXC25BV1B, ATXC35BV1B, ATXC50BV1B, ATXC60BV1B, ATXC71BV1B, ATXB25C2V1B, ATXB35C2V1B
Open manufacturer sourceWhat does this code mean?
Indoor temperature sensor fault. The exact model manual determines applicability; a fault code alone does not prove a particular component is defective.
Source scope: Compatibility with specific model numbers has not been established. Always check your exact appliance manual.
The manufacturer lists this code and general meaning; compatibility with your exact model has not been verified. Follow your model manual.
Open manufacturer sourceWhat can you try?
- 01
Record the exact code and when it appeared
Note every letter and digit, the stage of the cycle and the full model label. Error meanings can vary between models.
What the result means: This prevents applying guidance for a different model or a similar-looking code.
- 02
Check accessible air filters and vents
With the unit off, clean only user-removable filters and clear obvious obstructions. Do not open the outdoor electrical cabinet.
What the result means: Blocked airflow can affect operation but may not explain the entire code.
- 03
Request service for repeated faults
Stop the unit if it makes abnormal sounds, trips the breaker or cannot heat/cool. Refrigerant handling and electrical testing require a technician.
What the result means: Provide both indoor and outdoor model numbers; never top up refrigerant blindly.
- 04
Prepare precise notes for the technician
Provide the code, model number, stage of the program, sounds and any leak. Avoid opening a warranty-covered appliance or authorizing replacements without diagnosis.
What the result means: A technician can test components rather than guessing from the code.
Stop immediately for leaks, smoke, burning smell or electrical danger. For gas leaks, leave the area and call local emergency services.
How do you actually fix this?
Start with safe checks. Some codes have no safe home fix; in that case we explain what the professional repair actually involves.
Practical fixes you can try
- With the AC off, clean only an accessible indoor filter and unblock indoor airflow. A sensor error can still be electrical rather than caused by dirt.
- Check the selected operating mode and avoid forcing extreme settings while the sensor error remains.
- Do not touch outdoor sensors, pipes or wiring and do not assume a reset fixes a persistent failure.
If it persists, how is it actually repaired?
An HVAC technician compares the code-specific indoor/outdoor temperature sensor readings with the model table, tests its connector and sensor separately, and repairs the proven fault.
How do you know it is fixed? Sensor data should stabilize and the protective code should not recur.
Safety and warranty: Warranty terms depend on manufacturer, model and local law. Damage caused by unauthorised disassembly or improper repair may be excluded. Live electrical work, gas, refrigerant circuits and sealed cabinets require qualified professionals; this is not a DIY instruction for those tasks.
Evidence: The manufacturer link above supports the broad code meaning. The repair pathway is a general technical diagnostic explanation, not a confirmed failed-part diagnosis for every model.
Manufacturer source
Independent safety-focused explanation with a manufacturer link. Possible causes are not verified part diagnoses; the code may vary by model or region.
Open original manufacturer guidance ↗