BoilerFaultCodesThe 6 most common faults
Your boiler has no electricity reaching it or an internal component has failed, causing the unit to stop working completely.
Check if your home's main fuse box has a tripped circuit or a blown fuse.Verify that the boiler's power switch on the wall or fused spur is switched 'ON'.Replace the fuse in the boiler's wall-mounted power socket with a new 3-amp fuse.
Your boiler is attempting to light the main burner but the gas is failing to ignite, causing it to spark continuously without firing up.
Check that your gas supply is turned on at the meterEnsure the pilot light is lit through the viewing windowIf the pilot is out, follow the manual to relight it using the grey control button
Your boiler is trying to light but the main burner is failing to catch fire, even though the ignition spark is clicking.
Check that your gas supply is turned on at the meterEnsure your thermostat is set higher than the current room temperatureCheck if other gas appliances in your home are working correctly
Your boiler has stopped working for safety reasons and needs a manual reset to attempt to fire up again.
Locate the reset button on the control panel behind the front flapPress and hold the reset button for at least five secondsWait for the orange light to turn off and the boiler to attempt to reignite
Your boiler is receiving a constant electrical signal even when it should be off, often caused by a faulty external control or internal wiring issue.
Full guide for Orange light (first)Your boiler has detected power coming from the thermostat while the main power is also on, which usually means an internal electrical component has failed or stuck.
Full guide for Orange light (second)on the Baxi Bermuda 60/4
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