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Error Codes

Error codes are shown on our boilers to indicate that the product has an issue. There are different codes to indicate different categories of issues.

The most common error codes are explained below.

If your boiler is displaying an error code which isn't described below, please contact Baxi Customer Support, who will be able to help.

 


  • EcoBlue
  • Platinum
  • Duo-tec/Megaflo
  • Avanta range
  • GA range
  • Solo
  • E168

All fault codes are shown as E with numbers(s) following.

 

If the code does not have an E prefix it is not a fault, it is an operating status code, boiler on/off or temperature etc. In these cases the user guide should be consulted.

 

In all cases the user should try to reset the boiler first; power cuts etc. can affect the normal boiler operation. 

 

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

 

Code Possible Fault User Action
110 Overheat Check radiators are bled
117 Water pressure too high Bleed water from radiators
118 Water pressure too low Add water via filling loop
125 Water circulation fault Bleed radiators, check system water pressure and refill via filling loop if low
133  Safety time to establish flame exceeded Check gas is turned on, if prepayment meter check there is credit. If all ok and this fault persists - contact engineer to visit and investigate

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help. In all cases the user should try resetting the boiler before a call is arranged.

Fault codes on these boilers are shown as alternative flashing E or E1 and then two other numbers.

If the code has an A prefix this is a PCB programming code and should not be seen; this is usually due to a power supply fluctuation and resetting the boiler should clear it.

If the code is 0 or another number without a letter prefix, these are normal operating status codes. See user guide.

In all cases the user should try resetting the boiler before a call is arranged. 

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

Code Possible fault Action
E110 Overheat Ensure radiators are bled of air
E119 Low water pressure Add water to the system via filling loop
E125 Overheat Ensure radiators are bled of air
E131 Overheat lock out This may follow a power cut, try reset
E133 Gas supply fault Check gas is turned on, if prepayment meter check there is credit. If all ok and E133 persists - contact Engineer to visit & investigate
E168 PCB lock out May follow power supply problem; try reset. For more information, click here.

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help.

Fault codes on these boilers are shown as alternative flashing E or E1 and then two other numbers.

If the code has an A prefix this is a PCB programming code and should not be seen; this is usually due to a power supply fluctuation and resetting the boiler should clear it.

If the code is 0 or another number without a letter prefix, these are normal operating status codes. See user guide.

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

 

Code Possible fault Action
E110 Overheat Ensure radiators are bled of air
E119 Low water pressure Add water to the system via filling loop
E125 Overheat Ensure radiators are bled of air
E131 Overheat lock out This may follow a power cut, try reset
E133 Gas supply fault Check gas is turned on, if prepayment meter check there is credit. If all ok and E133 persists - contact Engineer to visit & investigate
E168 PCB lock out May follow power supply problem; try reset. For more information, click here.

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help. In all cases the user should try resetting the boiler before a call is arranged. 

Fault codes on Baxi Avanta products are shown as E with following number(s).

  

If the code does not have an E prefix it is probably a normal operating code either temperature or boiler off etc;in these cases the user should consult the user guide. In all cases the user should try to reset the boiler first. Power cuts etc. can affect the boiler. 

 

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

 

Code Possible fault  User actions
E1 Overheat Bleed radiators, check system water pressure; if low refill via filling loop
E2 Circulation Bleed radiators, check system water pressure; if low refill via filling loop
E4 Ignition failure Ensure gas supply is turned on. If meter is a prepayment type ensure there is credit
E7 Poor circulation Bleed radiators, check system water pressure; if low refill via filling loop

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help.  

All fault codes are shown as E with numbers(s) following.

 

If the code does not have an E prefix it is not a fault, it is an operating status code, boiler on/off or temperature etc. In these cases the user guide should be consulted.

 

In all cases the user should try to reset the boiler first; power cuts etc. can affect the normal boiler operation. 

 

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

 

Code Possible fault  User action
E53 Poor combustion Check flue terminal is not obstructed
E110 Overheat Check radiators are bled
E117 System water pressure high Bleed water from radiators
E118 System water pressure low Add water via filling loop
E125 Overheat Check radiators are bled
E133 Gas supply fault Check gas is turned on, if prepayment meter check there is credit. If all ok and E133 persists - contact Engineer to visit & investigate

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help.

Homeowners may be able to remedy some of the error codes shown by a boiler. These error codes are listed below with the action required to prevent the error reoccurring.

Code Possible fault Action
Flash off on Overheat lockout Ensure radiators are bled of air, try reset.
Flash on flash PCB fault May follow a power cut or power supply problem; try reset. For more information, click here.
Flash on on PCB fault May follow a power cut or power supply problem; try reset. For more information, click here.

Are you seeing a different error code?

All other error codes will require a heating engineer or installer to inspect the faulty boiler in order to fix the problem. This is because these errors require greater technical knowledge, such as wiring or sensor faults. Click here to find a local installer who can help.

About error code E168

If you are an installer looking for information please visit our installer advice page.

What does error code E168 mean?

Error code E168 is displayed when the boiler has detected a problem but can't work out exactly what it is. This can happen if the boiler has reset after developing a fault or if there has been an issue externally which affects the boiler, such as a fault with the electrical supply.

If the boiler has reset, it may have been displaying a different error code before showing E168. Making a note of any error codes you see will be extremely helpful to any installer trying to rectify the issue.

Will this code appear on my boiler?

The boilers that could report an E168 error are:

• Baxi Duo-tec Combi
• Baxi Duo-tec Combi
• Baxi Megaflo System
• Baxi Megaflo System
• Baxi Platinum Combi
• Baxi Platinum Combi

When is this code likely to appear?

Commonly, E168 appears for one of the following two reasons:

1. The boiler has detected a problem and has then been reset

Sometimes when error code E168 is displayed, the boiler will have been reporting one of the following error codes beforehand: E20, E28, E50, E110, E119, E125, E130, E131, E133, E156, E160

These error codes all reference specific problems with the boiler and can be fixed with relative ease by a Gas Safe registered engineer. In this situation, E168 appears because the boiler has reset. This is triggered either by a person using the boiler controls or by a computer programme automatically running in the boiler system. A reset makes the boiler forget that it has a problem until it tries and fails to start up. Sometimes, when this happens, the boiler then can't detect the exact problem as it did before, so it displays E168. See below for more detail about what you should do if E168 is displayed.

2. The electricity supply to the boiler has been interrupted

Boilers need a constant, reliable and regular supply of mains electricity to work properly. If this isn't available or becomes interrupted, then the boiler is likely to fail. When this happens, E168 appears because the boiler detects that it isn't working properly but is not able to detect any faulty parts, as there aren't any.

What should I do if an error code such as E168 appears on my boiler?
If your boiler is displaying an error code, it needs attention. As a result, it's recommended that you call your local Gas Safe registered installer to come out and take a look. If you can, call the installer who originally fitted your boiler, as they should already be familiar with the workings of your central heating system.

To find a local installer, use our Find an Installer tool.

Baxi Customer Support can also help. Call 0344 871 1545 or complete this form.

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