Remeha Gas 350 Fault Codes

System Natural Gas 45-121 kW 1994-2007 Discontinued

GC Numbers: 41-115-0141-115-0241-115-0341-115-0441-115-0541-115-0641-115-0741-115-08

Replaced by: Gas 310 Eco

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Most common fault codes

Code	Severity	Plain English	DIY
1-2-3	Medium	Your boiler has detected a general issue that needs checking to prevent a full breakdown.	Yes
4-5	Low	Your boiler is notifying you that it has successfully transitioned to its second, higher stage of heating output.	Yes
6-7	Low	Your boiler is notifying you that it has successfully moved into its first stage of heating operation and is functioning as expected.	Yes
8-9	High	Your boiler has lost its electrical power supply and cannot turn on or heat your home.	Yes
10-11	Emergency	Your boiler has detected that a gas valve inside the unit is not closing properly, preventing it from safely starting the ignition process.	Engineer
12-13	High	Your boiler is failing to light or keep a flame going, which means your heating and hot water have stopped working.	Yes
14-15	High	Your boiler has detected that there is not enough water pressure in the system to operate safely, causing it to shut down.	Yes
16-17	Emergency	Your boiler has detected that dangerous exhaust fumes are being blown back into the appliance instead of exiting through the flue safely.	Engineer
18-19	High	Your boiler has lost water pressure or cannot detect enough water to operate safely, causing it to shut down to prevent damage.	Yes
20-21	High	Your boiler has shut down because it has detected internal temperatures that are too high, triggered by a safety sensor to prevent overheating.	Engineer

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