BoilerFaultCodesWarmflow E46 Fault Code
The Warmflow E46 fault code means: your boiler has lost its ability to monitor water pressure because the internal sensor is either broken or not communicating properly.. It appears on 3 Warmflow models in our database.
Technical description: System Pressure Sensor Error — sensor disconnected or faulty; consult Service Engineer
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Warmflow models that show the E46 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Warmflow E46 fault code information on this page is sourced and cross-checked against the official Warmflow service / installation manuals for each affected model.
- Warmflow Agentis Boilerhouse manual (PDF)
- Warmflow Agentis External manual (PDF)
- Warmflow Agentis Internal manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026