BoilerFaultCodesRemeha 10-11 Fault Code
Also written as 1011 — same fault.
The Remeha 10-11 fault code means: your boiler has detected that a gas valve inside the unit is not closing properly, preventing it from safely starting the ignition process.. It appears on 3 Remeha models in our database.
Technical description: Valve leakage failure
What causes the Remeha 10-11 fault?
This fault occurs when the boiler's safety system detects gas passing through the internal valves when they should be tightly shut. The most common reason is that small pieces of debris or wear and tear have prevented a valve from seating correctly, or the electronic sensor responsible for checking the seal has failed. Because the boiler cannot guarantee it can stop the flow of gas, it shuts down immediately to ensure your safety.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Remeha models that show the 10-11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Remeha 10-11 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026