Baxi boilers fault codes
Baxi uses a three-digit E code, and the numbering is shared across the wider Baxi Heating group — which is why a Potterton engineer will recognise an E119 immediately. The codes are stable across the Duo-tec and 600 series, and the first digit is a rough guide to the family: E1xx is a system or safety condition, E13x tends to be ignition and gas.
Where the code shows on a Baxi
The code appears on the LCD panel behind the front flap on Duo-tec and 600 series models, usually prefixed with E and sometimes alternating with the flow temperature.
How to reset a Baxi
Press and hold the reset button on the control panel for about three seconds. On models with a rotary selector, turn it to the reset position and hold briefly rather than clicking through it.
Most common Baxi faults
The Baxi codes people look up most.
- E119Get it checkedSystem pressure has fallen below the level the boiler will operate at. Refilling to 1.2 bar and resetting usually clears it in a few minutes.
- E133Stop — call an engineerThe boiler failed to establish a flame and has locked out on the gas valve. Do not reset it more than twice.
- E125Get it checkedThe boiler is not detecting enough water movement through it and has stopped. Usually the pump, an air lock, or a blocked filter.
- E160Get it checkedThe fan is not running at the speed the appliance expects. Baxi direct engineers to check the fan and its cable, in that order.
Every Baxi fault code
8 published codes. Filtering happens in the page — every code is in the HTML.
Showing 8 of 8 codes
Baxi models
Codes can differ between generations. Check yours.
Guides that help with Baxi faults
How to repressurise a boiler
The five-minute job that resolves more no-heating calls than any other. Here is how to do it properly, and how to tell when topping up is the wrong answer.Read the guideWhat to do when your condensate pipe freezes
The single most common winter boiler fault, and one of the few you can genuinely fix yourself in fifteen minutes with a kettle and some patience.Read the guideBoiler fault codes explained: what they actually tell you
Codes look like diagnoses and are not. Understanding which family a code belongs to turns a meaningless number into a genuinely useful starting point.Read the guide
Looking for Baxi’s own support? www.baxi.co.uk. We are not affiliated with Baxi.