Stiebel Eltron
Flow Detection Stuck On
Water heater runs continuously and does not shut off when hot water taps are closed.
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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
Flow sensor stuck or jammed by debris, Cross-connection between hot and cold lines causing backflow, Faulty flow sensor electronics, Incorrect plumbing causing thermosiphon circulation
How to Fix / Troubleshooting
Safety: Turn off power and water supply before opening the unit.
- Confirm no flow: Ensure all hot water taps are fully closed and that there is no recirculation system feeding the heater incorrectly.
- Inspect flow sensor: Remove and clean the flow sensor turbine and housing. Remove any debris or scale that could cause it to spin or signal flow when there is none.
- Check plumbing: Verify there are no cross-connections between hot and cold lines that could cause unintended flow through the heater.
- Replace sensor if needed: If the heater still indicates flow with all taps closed, replace the flow sensor assembly.
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Repair Difficulty
Medium
3/5
Required Part
Flow Sensor Assembly
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