BoilerFaultCodesThe 6 most common faults
Your boiler has detected that there is not enough water in the system to operate safely, causing it to shut down to prevent damage.
Why it happens: This fault occurs when the internal sensors detect that the water pressure has dropped below a safe level for the pump and heat exchanger to function. The most common reasons are a slow leak hidden somewhere in your pipework or radiators, or because you recently bled your radiators without topping the system back up.
Locate the filling loop valves on the pipework underneath the boiler.Slowly open the valves until you hear water entering the system.Watch the pressure gauge and close the valves once the needle reaches between 1.0 and 1.5 bar.
Your boiler has stopped working because it cannot detect water moving through the system to keep it from overheating.
Why it happens: This fault occurs when the boiler's internal sensors detect that water isn't moving through the unit quickly enough to safely carry heat away. The most common reasons are a seized internal pump, a significant blockage in the pipework, or a faulty sensor providing an incorrect reading to the control board.
Check if the pressure gauge is below 1 bar and top it up using the filling loopEnsure all radiator valves and boiler isolation valves are fully openCheck for any visible leaks around your radiators or the boiler itselfRestart the boiler once the pressure is correct
Your boiler has lost power or the screen has stopped working, meaning you cannot see the status of your heating and hot water.
Why it happens: This fault occurs when the communication link between the boiler's brain and its display screen is broken, or when the components have lost electrical power entirely. The most common reason is a technical failure within the display circuit board or a blown internal fuse caused by a sudden power surge. Without this connection, the boiler cannot receive commands or show you what it is doing.
Check if your home's main electrical consumer unit has a tripped circuit breakerEnsure the boiler's power switch or fused spur on the wall is turned onCheck if any other appliances in the house have lost power
Your boiler has no power or the control screen has failed, meaning the heating and hot water will not work until electricity is restored to the unit.
Why it happens: This fault occurs when the boiler's control system loses electrical power or the communication between the internal components is broken. The most common reasons are a blown internal fuse caused by a temporary power surge or a hardware failure within the main circuit board or display screen.
Check if other appliances in the house are working to rule out a general power cut.Inspect your main fuse box/consumer unit to see if the heating circuit tripper switch has flipped to 'OFF'.Check the fused spur switch (usually a red neon light switch near the boiler) to ensure it is turned on and the fuse hasn't blown.
Your boiler is struggling to keep a flame lit, which means the system has safely shut itself down to prevent a fault.
Why it happens: This fault occurs when the boiler's internal sensors lose track of the flame after it has already started. The most common reasons are a buildup of carbon on the ignition parts or a blockage in the condensate trap that causes water to back up into the heat exchanger. It can also be triggered by an unstable gas supply or a faulty gas valve failing to maintain a steady flow.
Check that your gas pre-payment meter (if you have one) has credit.Verify that other gas appliances, like a hob, are working correctly to rule out a gas supply issue.Restart the boiler by pressing the 'Reset' button on the display panel.
Your boiler thinks it sees a flame before it has even started the ignition process, which is a safety conflict that prevents it from running.
Why it happens: This fault occurs when the boiler's internal sensors detect a flame signal even though the gas valve hasn't been told to open yet. The most common reasons are a damaged flame sensing electrode that is sending a false signal, a gas valve that is leaking slightly, or a glitch in the main circuit board's electrical logic.
Full guide for 4.6on the Ideal Vogue Gen2
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 Ideal 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