BoilerFaultCodesThe 6 most common faults
Your boiler has reached an unsafe temperature and has automatically shut down to prevent damage.
Check that all radiator valves are fully open to allow water to circulateEnsure there is enough water pressure in the system (typically 1.0 to 1.5 bar on the gauge)Wait for the boiler to cool down and then press the reset button
Your boiler has detected that there is not enough water pressure in the system to operate safely, causing it to shut down to prevent overheating.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the valves until the pressure rises to 1.5 bar, then ensure they are closed tightly.Press the reset button on the boiler control panel.
Your boiler is not circulating enough water through the system, causing it to overheat and shut down for safety.
Check if your boiler pressure gauge is between 1.0 and 1.5 bar and top up if lowEnsure all radiator valves are fully openBleed your radiators to remove trapped air from the system
Your boiler is failing to light the gas flame and has locked itself out for safety.
Check if your gas meter has credit (if using a prepay meter).Ensure other gas appliances in your home, like a cooker, are working correctly.Try to reset the boiler by pressing the flame/reset button once.
Your boiler was working but the flame has gone out unexpectedly, meaning the system cannot heat your home or water.
Check if other gas appliances in your home, like a hob, are working to confirm gas supply.If you have a pre-payment meter, check that you have enough credit.Press and hold the reset button (usually marked with a flame or cross symbol) for five seconds.
Your boiler’s internal control board has become too hot and has shut down as a safety precaution to prevent damage.
Turn the boiler off using the main power switch.Wait for 30 minutes to allow the internal electronics to cool down completely.Ensure there are no external heat sources near the boiler and turn the power back on.
on the Vaillant Combi Compact 282EB
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 Vaillant 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