Ravenheat CSI 120 Fault Codes

Combi Natural GasLPG 35 kW 2001-2009 Discontinued

GC Number: 47-581-01

Replaced by: CSI 150

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
01	High	Your boiler has failed to light, which means you will not have any heating or hot water until the issue is resolved.	Engineer
02	High	Your boiler has detected an internal temperature issue and has locked itself out to prevent overheating.	Yes
04	High	Your boiler has sensed that it is getting too hot and has shut itself down to prevent damage or safety issues.	Engineer
12	High	Your boiler's internal thermometer for the central heating system has stopped working correctly, which means the system cannot monitor or control the water temperature.	Engineer
17	High	Your boiler has stopped working because the fan is not receiving the correct electrical power needed to safely clear exhaust fumes.	Engineer
28	High	Your boiler has detected that there is not enough water pressure or flow to operate safely, which is preventing your heating and hot water from working.	Yes
30	High	Your boiler has shut down because a sensor has detected that the exhaust gases are getting too hot or the sensor itself has failed.	Engineer
31	High	Your boiler has detected that the exhaust gases are not being monitored correctly and has shut down for safety.	Engineer

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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