The 5 most common fault codes for a Baxi Boiler

The Baxi Boiler, like any other heating system, can encounter various fault codes indicating issues with its operation. The five most common fault codes for a Baxi Boiler, along with their potential causes and solutions, are as follows:

1. E110 – This fault code typically indicates a problem with the boiler’s ignition. It could be due to issues with the gas supply, ignition electrode, or gas valve.
   • Solution: First, ensure that the gas supply to the boiler is uninterrupted.
   • Check for any visible signs of damage to the ignition electrode or gas valve.
   • If the gas supply is intact and components are undamaged, it may be necessary to reset the boiler and attempt to reignite it.
   • If the issue persists, contacting a qualified gas safe engineer for further diagnosis and repair is advisable.
2. E119 – This fault code indicates that there is low water pressure in the system, potentially leading to inadequate heating and hot water supply.
   • Solution: Check the pressure gauge on the boiler; it should typically be between 1 and 1.5 bar.
   • If the pressure is below this range, the boiler’s pressure may need to be increased. Refer to the boiler’s manual for specific instructions on how to do this safely.
   • Additionally, inspect the system for any visible leaks that may be causing the pressure drop.
   • If the pressure continues to drop after re-pressurizing the boiler, there may be a leak in the system that requires professional attention.
3. E133 – This code indicates a problem with the flame detection sensor, potentially caused by issues with the ignition, gas supply, or sensor itself.
   • Solution: Check for any visible signs of damage or obstruction to the flame detection sensor.
   • Ensure that the gas supply to the boiler is uninterrupted and that the ignition system is functioning correctly.
   • If the sensor appears to be functioning but the fault persists, it may be necessary to replace the sensor or seek assistance from a gas safe engineer for further diagnosis and repair.
4. E168 – This fault code typically indicates a problem with the boiler’s PCB (printed circuit board), which controls various functions of the boiler.
   • Solution: Reset the boiler to clear the fault code and see if the issue resolves itself.
   • If the fault code persists after resetting the boiler, it is likely that there is a fault with the PCB itself.
   • In this case, it is recommended to contact a qualified technician to inspect the PCB and replace it if necessary.
5. E119 – This fault code indicates a problem with the boiler’s condensate pipe, which may be frozen or blocked, preventing the boiler from operating correctly.
   • Solution: Check the condensate pipe for any visible signs of blockage or obstruction.
   • If the pipe is frozen, carefully thaw it using warm water or a hot water bottle, taking care to avoid damaging the pipe. Once the pipe is clear, reset the boiler and monitor its operation.
   • If the issue persists, there may be an underlying problem with the pipe or its installation that requires professional attention.

In all cases, if you are unsure about how to proceed or if the fault persists after attempting the suggested solutions, it is recommended to contact a qualified heating engineer or technician for further diagnosis and repair. Attempting to fix complex boiler issues without the necessary expertise can be dangerous and may result in further damage to the system.