Main Fault Codes

Welcome to the fault-codes section of this site. The following table or page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. You may be guided through the fault finding sequence or steps, for rectifying your boiler with this fault code. Suggested repair solutions may be provided by a link to a repair page. NB Some fault codes are only applicable to a specific range of boilers only.

Faultcode Possible FaultUser ActionModel Specific
E20LinkFaulty componentsYou should make a note of the displayed error code and contact your installer or Baxi Customer SupportMain
E28LinkFaulty componentsYou should make a note of the displayed error code and contact your installer or Baxi Customer SupportMain
E50LinkFaulty componentsYou should make a note of the displayed error code and contact your installer or Baxi Customer SupportMain
E110LinkDisplayed overheat of the primary water or flue system has occurredTurn the selector switch to the reset position and hold for at least 5 seconds. If the boiler does not relight, or the code is displayed regularly contact your installer or Baxi Customer Support.Main
E119LinkDisplayed when the primary water pressure is less than 0.5 barYou can repressurise the boiler yourself. You can watch a video to find out how to do it hereMain
E133LinkIndicates that the gas supply has been interrupted, ignition has failed or the flame has not been detectedEnsure that the gas supply has not been turned off, and turn the selector switch to the reset position and hold for at least 5 seconds. If the boiler does not relight, or the code is displayed . Regularly contact your installer or Baxi Customer Support.Main
E133LinkCan also display in the winter if the condensate pipe of your boiler has frozenThe boiler will switch off to protect itself. You can find out how to thaw your condensate pipeMain
E160LinkFaulty componentsYou should make a note of the displayed error code and contact your installer or Baxi Customer SupportMain
E168LinkCould mean that your boiler has detected a problem but can't work out exactly what it is.Ê This could be because the boiler has been reset after developing a fault or because there has been an external issue, such as a fault with the electrical supplyThe boiler might have been displaying a different error code prior to resetting, so it is useful to make a note of any error codes you see as this will help your installer identify the issue.Ê Call your installer or Baxi Customer Support if E168 persists.Main

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