BoilerFaultCodesWarmhaus E79 Fault Code
The Warmhaus E79 fault code means: your boiler is struggling to maintain its lowest flame setting, which is preventing it from running safely and efficiently.. It appears on 1 Warmhaus model in our database.
Technical description: Minimum regulation current reached – try resetting the boiler – checking the gas pressure and checking the combustion values and CO2 calibration – the board or valve might need replacing.
What causes the Warmhaus E79 fault?
This fault occurs when the boiler's internal computer is unable to stabilize the flame at its lowest power setting, often due to an incorrect mix of gas and air. The most common reason is a drifting gas valve or a worn ignition electrode that can no longer accurately detect the small flame needed for low-demand heating. If the electronic control board cannot safely regulate this flow, it shuts the system down to prevent internal damage.
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 E79 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus E79 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