A13
Beretta
Flow Temperature Sensor Fault
Display shows A13, furnace may continue to run at reduced performance or lock out depending on model
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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
Open or shorted flow NTC sensor, Loose sensor wiring, Sensor not properly inserted in flow pipe pocket, Faulty control board input
How to Fix / Troubleshooting
Safety: Isolate power before accessing sensors on the hydraulic group.
- Locate flow sensor: On Beretta furnaces with hydronic circuits, the flow NTC is usually clipped or inserted into a pocket on the flow pipe leaving the heat exchanger.
- Check connection: Ensure the NTC sensor plug is fully seated on the control board and that the cable is not damaged.
- Inspect sensor placement: Confirm the sensor is fully inserted into the pipe pocket and secured with its clip, ensuring good thermal contact.
If A13 remains, the NTC sensor is likely faulty and should be replaced with a Beretta-approved part.
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Repair Difficulty
Medium
3/5
Required Part
Flow NTC Temperature Sensor
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