BoilerFaultCodesThe 6 most common faults
Your boiler is struggling to move water around your heating system because there is either not enough pressure inside the pipes or the internal pump has stopped working.
Check the pressure gauge on the front panel; if it is below 1 bar, locate the filling loop under the boiler.Slowly open the valves on the filling loop until the gauge needle rises to between 1 and 1.5 bar.Close the filling loop valves tightly and reset the boiler by turning the selector switch to the reset position.
Your boiler has detected that water is not circulating correctly through the system, which prevents it from heating up safely.
Check that your central heating valves (lockshields) are openEnsure all radiator valves (TRVs) are turned to maximumGently bleed your radiators to remove any trapped airEnsure the boiler pressure gauge is between 1.0 and 1.5 bar
Your boiler has sensed that it is becoming too hot and has automatically shut down for safety purposes.
Ensure all radiator valves are fully openCheck that your system pressure is between 1.0 and 1.5 barRotate the selector switch to the 'Reset' position for five seconds and then back to heating or hot water
Your boiler is struggling to light or keep its flame burning, which has caused it to shut down for safety.
Check if your gas supply is active by testing another gas appliance like a hob.Ensure your credit is topped up if you have a prepayment gas meter.Press the reset button once to see if the boiler restarts.
Your boiler has detected a system error that it cannot clear itself, which could be anything from a temporary glitch to an internal electronic part failure.
Locate the main selector switch on the front panelTurn the switch to the 'R' (Reset) position and hold it for at least 5 secondsReturn the switch to its original position (Heating or Hot Water) and wait for the boiler to restart
Your boiler has detected that water is not circulating properly through the system even though the pump is trying to run.
Check that the boiler pressure is between 1.0 and 1.5 bar on the gaugeEnsure all radiator valves and isolation valves under the boiler are fully openGently bleed air from your radiators using a radiator key
on the Baxi Combi 80e
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 Baxi 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