BoilerFaultCodesThe 6 most common faults
Your boiler has detected that the water pressure is too low or isn't circulating properly, causing the system to shut down for safety.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is below 1 bar, use the external filling loop to top up the system with water.Restart or reset the boiler to see if the error clears once the pressure is correct.
Your boiler has stopped heating because internal sensors have detected an incorrect temperature reading, often due to a temporary glitch or overheating.
Locate the control panel on the front of the boilerTurn the control knob to the 'R' or 'Reset' position for approximately five secondsReturn the knob to its original position and wait for the boiler to restart
Your boiler has stopped working because water is not moving around the system properly, which is causing it to overheat and shut down for safety.
Check that your home's central heating valves are openEnsure the system pressure is between 1.0 and 1.5 barTry resetting the boiler to see if the pump was simply stuck after a period of inactivity
Your boiler has detected that the temperature in the central heating pipes has become too high, causing it to shut down for safety.
Check that your radiator valves are fully open to allow water to circulate.Ensure the boiler pressure gauge is between 1 and 1.5 bar, and top up if necessary.Check if any bypass valves are closed and try restarting the boiler.
Your boiler has detected that the water pressure in the system is too low to run safely and has stopped working to prevent damage.
Locate the filling loop (usually a silver braided hose with small taps) underneath the boiler.Open both taps slowly until you hear water moving and watch the pressure gauge.Close both taps firmly once the pressure gauge needle reaches between 1.0 and 1.5 bar.
Your boiler has got too hot and has shut down as a safety precaution to prevent damage.
Turn the boiler off and allow it to cool down for 20 minutes.Ensure all radiator valves are fully open and there are no obstructions to the system flow.Locate the reset button on the control panel and press it to restart the unit.
on the Ravenheat TS 90
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