E10
Remeha
No circulation / pump or flow switch fault
Boiler displays E10 and will not start central heating
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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
Seized circulation pump, Air lock in pump or system, Closed isolation valves on flow/return, Faulty flow switch or flow sensor
How to Fix / Troubleshooting
Safety first: Isolate power before touching the pump or opening any bleed points.
- Check isolation valves: Ensure the flow and return valves under the boiler are fully open.
- Bleed the pump (if fitted with bleed screw): With power off, carefully loosen the pump vent screw to release trapped air and then retighten. Have a cloth ready for small water drips.
- Listen for pump operation: Restore power and call for heat. The pump should hum and vibrate slightly. If silent, it may be seized or not powered.
- Engineer tasks: Test pump electrically, free or replace the pump, and check the flow switch or flow sensor for correct operation.
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Repair Difficulty
Hard
4/5
Required Part
Primary Circulation Pump
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