Remeha Boiler Error Code E.04.10
E.04.10 means the burner has failed to start five times in a row and the boiler now locks out. Check that the gas tap is open and there is gas, and reset once. If it keeps failing, an installer must check the ignition, the gas valve and the electrode.
Also shown as: E04.10
Applies to: Remeha Ace platform (Tzerra Ace, Calenta Ace, Avanta Ace)
Common causes
- No ignition spark: fault in the ignition transformer, the electrode or the wiring
- Spark but no flame: gas pipe not bled, gas tap closed, gas supply pressure too low or gas valve not working properly
- Flame but no or insufficient ionisation: electrode or earthing not in order
What to check, in order
- Check that the gas tap at the boiler and at the gas meter is open, and that another gas appliance, such as the cooker, works.
- Check the water pressure and bleed the system if needed.
- Reset the boiler once; if the code returns, call a qualified installer.
Clear the code and test
- Fix what the checks above found first — pressure topped up, a radiator bled, the thermostat set right. Resetting without fixing the cause only brings the code back.
- Make sure the boiler has power and the gas tap at the boiler is open.
- If the water pressure is below 1.5 bar, top it up to between 1.5 and 2 bar with the filling loop, as your manual shows.
- Press the reset button once and watch a full cycle: the boiler should start, heat the radiators or the tap water, and keep running without the code coming back.
When to call a professional
Most cases are solved by the checks above. Book a technician if any of these apply:
- The code comes back after you have run the checks and a test cycle.
- You smell burning, see sparks or scorch marks, or the breaker trips.
- Water is leaking and you cannot stop it.
- The fix needs panels opened beyond what your manual describes, or a part tested with a meter, and you are not set up for that.
When you call, give the brand, the code E.04.10, your model number (on a label on the type plate, usually at the bottom or on the side of the boiler) and the checks you already ran. It shortens the visit.
Parts that may be involved
Ignition/ionisation electrodeIgnition transformerGas valve
Parts are model-specific. Find your model number first — usually on a label on the type plate, usually at the bottom or on the side of the boiler — and match the part to that number before ordering.
Questions people ask about E.04.10
What does E.04.10 mean on a Remeha boiler?
E.04.10 means: Five failed burner starts detected. E.04.10 means the burner has failed to start five times in a row and the boiler now locks out. Check that the gas tap is open and there is gas, and reset once. If it keeps failing, an installer must check the ignition, the gas valve and the electrode.
Can I fix Remeha E.04.10 myself?
Start yourself: the checks on this page cover the causes you can reach without opening the machine up. If they point to a faulty part, testing or replacing it is usually a technician job.
How do I clear Remeha E.04.10?
Fix what the checks above found first — pressure topped up, a radiator bled, the thermostat set right. Resetting without fixing the cause only brings the code back. Make sure the boiler has power and the gas tap at the boiler is open. If the water pressure is below 1.5 bar, top it up to between 1.5 and 2 bar with the filling loop, as your manual shows.
Sources checked
The meaning and checks for this code were checked against the sources above in November 2026. Codes vary by model and region; if your manual lists a different meaning for your exact model, follow the manual.