A14
Hoval
Flow Temperature Sensor Fault
Boiler displays A14, no burner operation, may indicate sensor fault
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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-circuit or shorted flow NTC sensor, Damaged sensor wiring, Poor contact at PCB connector
How to Fix / Troubleshooting
Safety: Isolate power before accessing the control compartment.
- Visual inspection: Locate the flow temperature sensor (NTC) on the boiler flow pipe or heat exchanger. Check for damaged insulation or loose mounting.
- Check wiring: Ensure the sensor plug is fully seated on the PCB and that the cable is not pinched or burnt.
- Resistance test: A technician can measure the NTC resistance at room temperature and compare it with Hoval's specification. Replace the sensor if out of range.
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Repair Difficulty
Medium
3/5
Required Part
Flow Temperature Sensor (NTC)
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