BoilerFaultCodesWarmhaus E94 Fault Code
The Warmhaus E94 fault code means: your boiler is struggling to maintain a steady flame because it either isn't receiving enough gas or it is drawing in its own exhaust fumes.. It appears on 1 Warmhaus model in our database.
Technical description: Low gas pressure or exhaust recirculation that could be an issue with gas pressure.
What causes the Warmhaus E94 fault?
This fault occurs when the boiler's flame is unstable or failing to ignite correctly due to an incorrect balance of fuel and air. The most common reasons are a lack of incoming gas pressure from the meter or the boiler accidentally sucking in its own waste exhaust gases through a leak in the flue pipe. This prevents the burner from sustaining a safe, clean flame, causing the system to shut down for safety.
This issue is more frequent during extreme cold spells, as high demand on the local gas network can lead to a drop in pressure at the meter.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Warmhaus models that show the E94 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus E94 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