BoilerFaultCodesThe 6 most common faults
Your boiler has stopped working because the water pressure inside your heating system has dropped too low.
Locate the two silver filling loop taps located underneath the boiler.Open the taps slowly to allow water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both taps tightly to stop the flow of water.
Your boiler is struggling to circulate water properly, likely because the pressure inside your heating system has dropped too low or the internal pump is stuck.
Check the pressure gauge on the front of the boiler; if it is below 1 bar, locate the filling loop (usually a silver lever or flexible hose underneath).Slowly open the filling loop to let water into the system until the gauge reads between 1 and 1.5 bar.Close the filling loop firmly once the needle is in the green zone and restart the boiler.
Your boiler has detected that there is not enough water inside 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 ideally be between 1 and 1.5 bar.If the pressure is too low, use the filling loop underneath the boiler to carefully top up the water level.Once the pressure is corrected, turn the selector switch to the 'R' (Reset) position for five seconds and then release.
Your boiler is failing to light the gas flame despite several attempts, meaning you will not have any heating or hot water until the system is reset.
Check if other gas appliances in your home, like a cooker, are still working.Check that your gas pre-payment meter (if applicable) has enough credit.Rotate the selector switch to the reset position (marked 'R') for at least five seconds and then release.
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Wait 30 minutes for the boiler to cool down completely.Check that all radiator valves are open and not blocked by furniture.Turn the selector switch to the 'Reset' position (usually marked with an 'R') for at least five seconds, then turn it back to the 'On' position.
Your boiler has tried to ignite but was unable to stay lit, meaning your heating and hot water will not work until it is reset or repaired.
Locate the selector switch on the front control panelTurn the switch to the 'R' (Reset) position and hold for 5 secondsReturn the switch to its original position and check if the red light goes out
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