E10
Dimplex
Flow Switch / Flow Sensor Fault (DHW Demand Not Detected)
Boiler displays E10; domestic hot water runs cold; burner does not fire on hot water demand
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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
Stuck Dimplex DHW flow switch, Blocked Dimplex flow turbine sensor, Limescale or debris in DHW inlet filter, Faulty wiring between flow sensor and Dimplex PCB
How to Fix / Troubleshooting
Safety first: Turn off power and close the cold water isolation valve to the boiler before removing any DHW components.
User-level checks:
- Check water flow: Ensure good flow at hot taps. If flow is very low, clean tap aerators and check stopcocks are fully open.
- Reset the boiler: After confirming adequate flow, reset the boiler and test hot water again.
Professional actions:
- Clean or replace the Dimplex DHW flow switch or turbine sensor.
- Flush the DHW inlet filter and pipework to remove debris or limescale.
- Verify continuity of wiring from the flow sensor to the Dimplex PCB.
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Repair Difficulty
Medium
3/5
Required Part
Dimplex DHW flow sensor / flow switch
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