BoilerFaultCodesThe 6 most common faults
Your boiler has detected that the water pressure in the system is too low to operate safely and has shut down as a precaution.
Locate the filling loop (usually a silver braided hose underneath the boiler).Open the valves slowly to allow water into the system until the pressure gauge reaches between 1 and 1.5 bar.Turn the selector switch to the 'OFF/RESET' position and then back to 'ON'.
Your boiler has stopped working because the water pressure inside the system has dropped too low.
Locate the filling loop (usually a silver flexible hose) underneath the boiler.Slowly open the small tap(s) on the filling loop until you hear water moving.Watch the pressure gauge and close the taps firmly once it reaches between 1 and 1.5 bar.Reset the boiler by turning the dial to the 'off/reset' position and then back to 'on'.
Your boiler has encountered a technical communication or internal sensor error and has stopped working as a safety precaution.
Turn the mode selector switch to the 'OFF/RESET' position.Wait for approximately 30 seconds.Turn the switch back to the 'Hot Water' or 'Heating' position to see if the error clears.
Your boiler has failed to light the flame or detect the flame after trying to start, which has triggered a safety shutdown.
Check that your gas pre-payment meter (if you have one) has credit.Verify that other gas appliances in your home, like a cooker, are working correctly.Wait 5 minutes, then turn the selector switch to 'Reset' for a few seconds and switch it back to the required mode.
Your boiler has shut down because it has detected it is getting too hot, likely due to a circulation problem or a component failure.
Check that your radiator valves are fully open to allow water to flow.Verify that your system water pressure is between 1 and 1.5 bar on the pressure gauge.Wait for the boiler to cool down and try pressing the 'Reset' button.
Your boiler has detected that the water pressure is too low for the system to operate safely.
Locate the filling loop (the flexible silver hose usually found underneath the boiler).Slowly open the valve or valves on the filling loop until you hear water flowing.Monitor the pressure gauge on the front of the boiler until it reaches between 1.0 and 1.5 bar, then close the valves tightly.
on the Vokera Sabre 29H
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 Vokera 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