BoilerFaultCodesSime ALL 10 Fault Code
Also written as ALL10 — same fault.
The Sime ALL 10 fault code means: your boiler is struggling to detect the temperature of the water coming from your hot water tap, which means it will likely stop producing hot water until it is fixed.. It appears on 8 Sime models in our database.
Technical description: D.H.W. SENSOR ERROR
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Sime models that show the ALL 10 fault code
Click a model for the full fault code list and model-specific repair notes.
- iQE Comfort 30 Repair: £120-200
- Murelle Advanced HE Combi Repair: £150-250
- Murelle Advanced HE MkII Combi Repair: £150-250
- Murelle Elite HE 35T System Repair: £120-220
- Murelle Elite HE Combi Repair: £150-250
- Murelle HE Combi with Cylinder Repair: £120-200
- Murelle HE System Repair: £120-220
- Murelle Revolution 30 Repair: £120-220
Source
Sime ALL 10 fault code information on this page is sourced and cross-checked against the official Sime service / installation manuals for each affected model.
- Sime iQE Comfort 30 manual (PDF)
- Sime Murelle Advanced HE Combi manual (PDF)
- Sime Murelle Advanced HE MkII Combi manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026