E07
De Dietrich
Heating Circuit Flow or Return NTC Sensor Fault
Display shows flow/return sensor error, unit may overheat or shut down quickly
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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
Failed flow NTC sensor on De Dietrich primary circuit, Failed return NTC sensor, Broken sensor wiring, Moisture on sensor connector
How to Fix / Troubleshooting
Safety first: Disconnect power before removing covers.
Step-by-step checks:
- Identify sensors: Flow and return NTCs are typically clipped to or inserted into the primary flow and return pipes inside the unit.
- Check wiring: Inspect the harness from each NTC to the main control board. Reseat connectors and ensure there is no corrosion.
- Compare temperatures: After restoring power, use the diagnostic menu (if available) to read flow and return temperatures. If one sensor shows an unrealistic value (e.g., -40°C or 130°C at startup), it is likely faulty.
When to call a professional: Sensor replacement is straightforward but requires access to internal components; if unsure, contact a service technician.
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Repair Difficulty
Medium
3/5
Required Part
Flow NTC Temperature Sensor
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