Riello Thermo Group • Italy
Repair and spare parts for Sime boilers in Madrid
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Sime is an Italian heating brand founded in 1955 and belonging to the Riello Thermo Group, which also includes Beretta and Lamborghini. Their boilers Murelle Condensing boilers have a strong presence in the Spanish residential market for new constructions and replacements since 2008. Being part of the same group as Beretta, they share some components.
Sime product range
- Murelle He – condensing combi, aluminium heat exchanger. The most installed in the range in Spain.
- Murelle Plus – Condensing, higher output. For homes with high demand.
- RIO 3 HE – condensing heating only, for systems with external DHW tank.
- 2H Series – conventional forced draught boiler. Installed in Madrid before 2010.
Most common fault codes
| Code | Meaning | Common cause |
|---|---|---|
| A01 | Ignition fault | No flame: gas, electrode, or gas valve |
| A03 | Overtemperature | Temperature exceeded: pump or limit thermostat |
| A05 | NTC heating sensor | Heating temperature sensor |
| A06 | DHW NTC sensor | Domestic hot water sensor |
| A07 | Fan fault | Blocked extractor or voltage |
| E10 | Low pressure | Water below 0.5 bar |
Sime spare parts: stock and 24-hour delivery
Spare parts for Murelle and 2H Series ranges. Parts shared with Beretta (Riello Group). Shipments in 24‑48 h.
View Sime spare parts catalogueFrequently Asked Questions
They are part of the same group, Riello Thermo. Sime and Beretta share technical platforms in some condensing models, which improves the availability of common spare parts (pumps, NTC, fans).
A01 indicates lockout due to ignition faultThe boiler has locked out because it did not detect a flame after several attempts. Check that the gas is open. Reset with the reset button and if it repeats, a technical visit is required.
Annual inspection according to RITE regulations. Includes cleaning of the burner, inspection of the heat exchanger, and issuance of the official certificate.