A17
Beretta
Ambient / External Sensor Fault
A17 displayed; unit may show incorrect temperatures or behave erratically
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Faulty external temperature sensor (if fitted), Broken outdoor sensor cable, Incorrect sensor type installed, PCB sensor input failure
How to Fix / Troubleshooting
Safety: Turn off power before working on external sensor wiring.
- 1. Check if external sensor is installed: Some Beretta models support an outdoor or remote sensor. If none is installed but A17 appears, configuration may be incorrect.
- 2. Inspect sensor location: Ensure the outdoor sensor (if present) is mounted correctly, not in direct sunlight or near heat sources.
- 3. Wiring check: Follow the cable from the sensor to the heater. Look for cuts, crushed sections, or loose terminals.
- 4. Resistance test (technician): Measure sensor resistance and compare with Beretta's chart. Replace if out of range.
- 5. Configuration check: A technician should verify in the installer menu that the sensor type and presence are correctly configured.
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Repair Difficulty
Medium
3/5
Required Part
Outdoor temperature sensor
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