Atag iC & iS Fault Codes

CombiSystem Natural GasLPG 24-40 kW 2013-present

All 3 fault codes

Code	Severity	Plain English	DIY
50	Medium	Your boiler has detected a problem with the sensor that manages your hot water temperature, which may result in your taps running cold or having inconsistent heat.	Engineer
117	Emergency	Your boiler has detected that the water pressure inside the system is far too high, causing it to shut down for safety.	Yes
118	High	Your boiler has detected that the water pressure is too low for it to operate safely, or it is struggling to move water through the system.	Yes

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