E06
Chaffoteaux
Primary Flow NTC Sensor Fault
E06 appears on the display, water temperature is erratic or unit shuts down.
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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 primary NTC sensor, Loose NTC clip on heat exchanger, Damaged sensor wiring, Corroded connector on PCB
How to Fix / Troubleshooting
Safety: Disconnect power before working inside the appliance.
- Locate primary NTC: This sensor is usually attached directly to the primary heat exchanger or primary flow pipe.
- Check mechanical fixing: Ensure the NTC is firmly clipped or inserted into its pocket and has good thermal contact. Re-seat or replace the clip if loose.
- Inspect wiring: Follow the cable back to the PCB, checking for insulation damage or signs of overheating. Reseat the connector.
- Test resistance: Disconnect the sensor and measure resistance at room temperature. Compare with manufacturer data. Replace if out of tolerance.
- PCB check: If a known-good sensor still gives E06, the PCB sensor input may be faulty and should be replaced by a qualified technician.
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Repair Difficulty
Medium
3/5
Required Part
Primary Flow NTC Sensor
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