BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water pressure in the system has dropped too low.
Locate the filling loop (the flexible silver hose) underneath or near the boiler.Slowly open the valves on the filling loop until the pressure gauge on the boiler reaches between 1.0 and 1.5 bar.Close both valves fully and press the 'Reset' button on the control panel.
Your boiler has detected that the water pressure is too low to operate safely and has shut down to prevent damage.
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Open the valves slowly until you hear water entering the system.Watch the pressure gauge until it reaches between 1 and 1.5 bar, then close the valves tightly.Turn the selector switch to 'OFF/RESET' for a few seconds and then back to the 'ON' position.
Your boiler has encountered a technical communication or internal sensor error and has stopped working to protect itself.
Locate the mode selector switch on the front control panel.Turn the switch to the 'RESET' position and hold it for a few seconds.Return the switch to its original position and wait to see if the boiler restarts.
Your boiler has tried to light several times but cannot confirm that a flame has stayed lit, so it has shut down for safety.
Check if other gas appliances, like a hob, are working to confirm gas supply.Check that your gas meter has credit if you have a pre-payment meter.Move the mode selector switch to 'OFF/RESET' for a few seconds and then back to 'ON' to attempt a restart.
Your boiler has shut down because its internal temperature has gotten too high and a safety switch has tripped to prevent damage.
Check that all radiator valves are fully open to allow water to flow.Ensure the boiler pressure is between 1 and 1.5 bar on the pressure gauge.Wait for the boiler to cool down and try turning the selector switch to 'Reset'.
Your boiler has detected that the water pressure is either too low or the sensor that monitors it has stopped working.
Locate the filling loop (the flexible silver hose) underneath or near the boiler.Slowly open the valves until you hear water entering the system.Close the valves when the pressure gauge on the front of the boiler reaches between 1.0 and 1.5 bar.
on the Vokera Sabre 35H
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