BoilerFaultCodes
Sime Boiler Fault Codes
1,101 fault codes across 44 Sime boiler models — explained in plain English.
Italian manufacturer, part of the Riello Group. Commercial and domestic boilers.
Just want the most common Sime problems?
The top 8 faults across the whole Sime range — causes, DIY checks, repair costs.
High-severity Sime fault codes
01 02 04 05 06
Your boiler has detected that it is overheating and has automatically switched itself off to prevent damage.
Murelle EV HE Combi
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Murelle EV HE Combi
Your boiler has lost the ability to monitor the temperature of your hot water supply, meaning it will likely stop producing hot water until the faulty sensor is replaced.
Murelle EV HE Combi
Your boiler has stopped working because it is unable to accurately measure the temperature of the water used for your heating system.
Murelle EV HE Combi
Your boiler has detected a serious internal fault and has automatically shut itself down for safety reasons, meaning you currently have no heating or hot water.
Murelle EV HE Combi
All models
44 Sime boiler models
Murelle EV HE Combi
Combi Discontinued
Murelle HE System
System Discontinued
Murelle EV HE System
System Discontinued
Murelle One HE
Combi
Murelle Pro HE Combi
Combi Discontinued
Murelle Pro HE System R
System
Murelle Pro HE 25 HO
Heat Only Discontinued
Murelle Pro HE MkII Combi
Combi
Murelle Pro HE R MkII System
System
Murelle Elite HE Combi
Combi Discontinued
Murelle Elite HE 35T System
System Discontinued
Murelle Advanced HE Combi
Combi
Murelle Advanced HE MkII Combi
Combi
Murelle Revolution 30
Combi
Murelle HE Regular
Heat Only Discontinued
Murelle HE 110R
Heat Only
Murelle HE Combi with Cylinder
Combi Discontinued
Format DGT HE Combi
Combi Discontinued
Format DGT HE System
System Discontinued
Format HE Combi
Combi Discontinued
Format System HE
System Discontinued
Format B Combi
Combi Discontinued
Format C Combi
Combi Discontinued
Brava DGT HE
Combi Discontinued
Brava One HE
Combi
Brava Slim HE System
System
Brava Slim HE Regular
Heat Only
Ecomfort HE Combi
Combi Discontinued
Ecomfort System 25 HE
System Discontinued
Ecomfort Plus HE
CombiSystem Discontinued
Ecomfort Plus HE EV Combi
Combi Discontinued
Ecomfort System Plus HE EV
System Discontinued
Meridian HE
Combi Discontinued
Dewy 30/130 HE FS
Combi Discontinued
Dewy 30/50 HE WM
Combi Discontinued
Friendly
Combi Discontinued
Planet Super 4 WM
Combi Discontinued
Planet Dewy BFR
Heat Only Discontinued
Metropolis DGT 25 BF
Combi Discontinued
iQE Comfort 30
Combi Discontinued
Halstead Trio
Combi Discontinued
Giulia Combi 30
Combi
Mia 30
Combi
iQE Simplicity 20T
Regular Discontinued
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