E11
CTC
DHW Flow Sensor / Turbine Fault
Boiler displays E11; DHW demand not recognised or intermittent.
Advertisements
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.
Advertisements
Possible Causes
Stuck or scaled DHW flow turbine, Blocked inlet filter, Faulty DHW flow sensor, Wiring fault to DHW sensor
How to Fix / Troubleshooting
Safety: Isolate power and close the cold water inlet valve to the boiler before opening any DHW components.
- Check water flow: Open a hot tap fully. If flow is weak, clean inlet strainers and check stop valves are fully open.
- Inspect DHW flow sensor: Locate the DHW flow sensor/turbine assembly on the cold inlet of the CTC boiler. Remove according to the service manual.
- Clean turbine: Rinse the turbine and housing under clean water to remove scale or debris. Ensure the turbine spins freely when blown on gently.
- Check sensor connection: Refit the assembly and ensure the electrical connector is secure. Replace the DHW flow sensor if the boiler still does not detect flow.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
DHW Flow Sensor / Turbine Assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements