Intergas Boiler Error Code 10
Code 10 means the boiler no longer measures the flow temperature: the circuit of sensor S1 is interrupted. Air at the sensor can cause this, so bleeding and resetting is worth trying. Otherwise an installer must replace the sensor or repair the wiring.
Applies to: Intergas HRE and Kombi Kompakt
Common causes
- Air in the boiler or at the sensor, so the reading drops out
- Loose or damaged wiring of sensor S1
- Faulty flow sensor S1
What to check, in order
- Bleed the boiler and the system and check the water pressure; top up to 1.5 to 2 bar if needed.
- Reset the boiler once and see whether the code stays away.
- If the code keeps returning, have an installer check sensor S1 and the wiring.
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 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
Flow sensor S1
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 10
What does 10 mean on a Intergas boiler?
10 means: Flow sensor S1 is open circuit (no signal). Code 10 means the boiler no longer measures the flow temperature: the circuit of sensor S1 is interrupted. Air at the sensor can cause this, so bleeding and resetting is worth trying. Otherwise an installer must replace the sensor or repair the wiring.
Can I fix Intergas 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 Intergas 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
- Intergas HRE Parameter List / Fault Finding (manufacturer document)
- Warmgarant: Intergas storingscodes
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.