BoilerFaultCodesWarmhaus E93 Fault Code
The Warmhaus E93 fault code means: your boiler is struggling to control its flame correctly and has shut down as a safety precaution.. It appears on 1 Warmhaus model in our database.
Technical description: Unable to regulate combustion – possible calibration value issue, chimney gas valve or board.
What causes the Warmhaus E93 fault?
This fault occurs when the boiler's internal computer can no longer accurately manage the mix of gas and air needed for a steady flame. It is usually triggered because the electronic control board is receiving incorrect readings or the gas valve has lost its ability to regulate the flow precisely. The system shuts down entirely because it cannot guarantee the boiler is burning fuel safely or efficiently.
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 E93 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmhaus E93 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