BoilerFaultCodesSime AL 62 Fault Code
Also written as AL62 — same fault.
The Sime AL 62 fault code means: your boiler has identified that it needs to perform a self-tuning sequence to ensure the gas and air are burning correctly, often triggered after a part has been replaced or a power disruption.. It appears on 13 Sime models in our database.
Technical description: Self-calibrating procedure is required — execute self-calibration procedure (required after gas valve, electrode, burner or fan replacement)
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 AL 62 fault code
Click a model for the full fault code list and model-specific repair notes.
- Brava One HE Repair: £80-130
- Brava Slim HE Regular Repair: £90-180
- Brava Slim HE System Repair: £80-160
- Dewy 30/130 HE FS Repair: £90-180
- Dewy 30/50 HE WM Repair: £90-160
- Halstead Trio Repair: £80-120
- Mia 30 Repair: £80-250
- Murelle One HE Repair: £80-160
- Murelle Pro HE 25 HO Repair: £90-180
- Murelle Pro HE Combi Repair: £90-160
- Murelle Pro HE MkII Combi Repair: £80-160
- Murelle Pro HE R MkII System Repair: £100-180
- Murelle Pro HE System R Repair: £90-180
Source
Sime AL 62 fault code information on this page is sourced and cross-checked against the official Sime service / installation manuals for each affected model.
- Sime Brava One HE manual (PDF)
- Sime Brava Slim HE System manual (PDF)
- Sime Dewy 30/130 HE FS manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026