BoilerFaultCodesWarmhaus E11 Fault Code
The Warmhaus E11 fault code means: your boiler is unable to control the gas flow properly because of a communication fault between its brain and the gas valve.. It appears on 1 Warmhaus model in our database.
Technical description: Gas valve modulator connection is broken – could be due to an internal failure.
What causes the Warmhaus E11 fault?
This fault occurs when the boiler's main control board loses the ability to send electrical signals to the gas valve. The most common reason is that the wiring connecting these two components has become loose or damaged, or the internal coil within the gas valve itself has failed. Because the boiler can no longer safely regulate the amount of gas entering the burner, it shuts down for safety.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Warmhaus models that show the E11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus E11 fault code information on this page is sourced and cross-checked against the official Warmhaus service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026