E20
De Dietrich
Water Content / Leak Detection Fault
Display shows leak / low water content error, unit will not start
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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
Internal leak in De Dietrich heat exchanger, Dripping safety valve, Faulty low-water sensor, Air in system causing false low-water reading
How to Fix / Troubleshooting
Safety first: Disconnect power and close water supply if an internal leak is suspected.
Step-by-step checks:
- Visual inspection: Remove the front cover and look for any signs of water inside the casing, especially around the heat exchanger and connections.
- Check discharge pipe: Inspect the safety valve discharge pipe for continuous dripping, which indicates overpressure or a faulty valve.
- Bleed air: Bleed air from high points in the system to ensure the low-water sensor is submerged.
When to call a professional: Internal leaks or low-water sensor replacement require professional service.
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Repair Difficulty
Professional Required
5/5
Required Part
Low-Water Sensor
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