Think of a fault code on your Baxi boiler as a specific message. Your boiler has clever internal controls and sensors that constantly check if everything is working as it should. If it detects an issue, like low water pressure, a problem with ignition, or an overheating situation, it will usually stop operating for safety reasons and show a code on its display. This code gives a clue about the nature of the fault. While some issues might have a simple fix, many codes point to problems needing a Gas Safe registered engineer to sort out safely.

Sometimes, a simple reset can get your Baxi boiler going again, especially if the issue was temporary. You can usually find the reset button on the front panel of your boiler – its location is shown in your boiler's manual. Give it a try once. If the boiler fires up and the fault code disappears, great! However, if the code comes back quickly or the boiler doesn't reset, there's likely an underlying problem. Repeatedly resetting your boiler without fixing the root cause could lead to a bigger issue or even compromise safety, especially if it's a gas or combustion related fault. If a reset doesn't work the first time, it's best to call us.

The E119 fault code on a Baxi boiler nearly always means low water pressure in your central heating system. Your boiler needs a certain amount of water pressure, usually between 1 and 1.5 bar (check your boiler manual for specifics), to circulate hot water effectively. If the pressure drops too low, the boiler will stop working to protect itself. You might be able to top up the pressure yourself using the filling loop – again, your manual will guide you. If you're unsure, or if the pressure keeps dropping after you've topped it up (which could signal a leak in the system), it's time to get a professional to check it over.

If your Baxi boiler is displaying an E160 fault code, it generally means the system has detected an overheat situation. This could be because the primary NTC thermistor (a type of temperature sensor) thinks the water temperature has exceeded safe limits. Causes might include a faulty pump not circulating water properly, a blockage in the system preventing water flow, or a problem with the sensor itself. The boiler will shut down to prevent damage. An engineer will need to diagnose why it's overheating.

Fault codes like E125, E130, or E131 on a Baxi boiler usually relate to a problem with the boiler's fan or the system that checks the fan's operation. The fan is crucial for pushing out waste gases through the flue and drawing in air for combustion. If the fan isn't running at the correct speed, or if a sensor thinks there's an issue with air flow or the flue system, the boiler will show a fault and shut down for safety. This could be a problem with the fan itself, its wiring, the flue, or the pressure differential switch that monitors it. This needs an expert to check.

Yes, absolutely. Modern Baxi boilers are packed with sensors (often called NTC thermistors) that monitor various things like water temperature, flow rates, and flue conditions. If one of these sensors fails or gives an incorrect reading, it can trick the boiler's main control board into thinking there's a problem, leading to a fault code and shutdown. For example, a faulty temperature sensor might tell the boiler the water is too hot or too cold when it isn't. An engineer can test these sensors and replace any that are faulty.

A fault code related to the flue system is a serious safety concern. The flue is responsible for safely removing the products of combustion (waste gases) from your home. If there's a blockage, a leak, or if the flue isn't fitted correctly, these dangerous gases could enter your property. Codes indicating a flue or ventilation issue (which can sometimes overlap with fan fault codes) mean the boiler has detected something unsafe about this process. Do not use the boiler and call a Gas Safe engineer immediately. They will check the entire flue system for integrity and correct operation.