BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light, which means you will not have any heating or hot water until the issue is resolved.
Check that your gas supply is turned on and other gas appliances are workingPress and hold the reset button for 5 secondsEnsure your credit meter has sufficient funds
Your boiler has detected that there is not enough water pressure or movement to operate safely, causing the system to shut down.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is too low, use the filling loop valves to top up the water level.Ensure all radiator valves and the main isolation valves under the boiler are fully open.
Your boiler has detected an incorrect temperature reading and needs to be restarted to clear the error.
Locate the reset button or dial on the front control panel.Press and hold the reset button for 5 seconds or turn the dial to 'R' and back.Wait for the boiler to complete its startup sequence and check if the code clears.
Your boiler has stopped working because the fan that clears out exhaust gases is not receiving the correct amount of electrical power.
Full guide for 17Your boiler has lost its ability to measure the temperature of the water in your radiators, which means it cannot safely heat your home.
Full guide for 12Your boiler has switched itself off because it got too hot, likely due to a circulation issue or a faulty internal safety sensor.
Full guide for 04on the Ravenheat Rsf
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Ravenheat shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue