F08
Ferroli
NTC Sensor Short Circuit
F08 displayed, unit may overheat or show unstable temperatures.
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Possible Causes
Shorted flow or DHW NTC, Damaged sensor cable, Moisture in connector, PCB input short
How to Fix / Troubleshooting
Safety: Isolate power before testing sensors.
- 1. Identify which NTC: The service manual or diagnostic menu may indicate which sensor is faulty (flow, return, or DHW).
- 2. Inspect and dry: Check the sensor and connector for moisture. Dry thoroughly and refit.
- 3. Replace sensor: If resistance is near zero ohms, replace the affected NTC.
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Repair Difficulty
Easy
2/5
Required Part
Temperature NTC Sensor
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