Fault Codes

If your Baxi boiler is displaying the E384 fault code, it means the boiler has detected a false flame signal. This occurs when the boiler believes a flame is present even though the gas valve is closed and no flame should exist. Although the E384 fault is not one of the most common Baxi error […]

If your Baxi boiler is displaying the E168 error code, it usually means the boiler has detected a fault but cannot identify a specific cause. Unlike many boiler fault codes that point to one particular issue, E168 is a general fault code that often appears when there is a problem with the boiler’s electronics, power

If your Baxi boiler is displaying the E125 fault code, it indicates a circulation problem within the heating system. This fault occurs when the boiler detects that heated water is not circulating properly through the system. Poor circulation can affect heating performance, reduce efficiency, and cause the boiler to shut down as a safety measure.

If your Baxi boiler is displaying the E128 fault code, it means the boiler has experienced a flame loss during operation. In simple terms, the boiler has detected that the burner flame has gone out unexpectedly and has shut down as a safety precaution. The E128 fault can be caused by several issues, including gas

If your Baxi boiler is displaying the E119 error code, it usually means the system pressure has fallen below the recommended level. The E119 error is one of the most common faults found on Baxi boilers and is designed to protect the appliance from operating with insufficient water in the heating system. Fortunately, this fault

A Baxi boiler displaying the E110 error code indicates that the appliance has overheated and automatically shut down as a safety precaution. This fault can be caused by several issues, including low water pressure, trapped air in the heating system, poor water circulation, or faulty components such as temperature sensors and pumps. Understanding what causes

If your Baxi boiler is displaying the E118 error code, it usually means the system pressure has fallen too low for the boiler to operate safely. This is one of the most common boiler faults and is often straightforward to fix without replacing any parts. In this guide, we’ll explain what the Baxi E118 fault

If your Baxi boiler is displaying the E133 error code, you may suddenly find yourself without heating or hot water. While this fault can be frustrating, it does not always mean there is a major problem with your boiler. In many cases, the issue can be caused by a gas supply interruption, a frozen condensate

If your Vaillant boiler is showing the F75 Fault code, it usually means the boiler cannot detect the pressure change it expects when the pump starts running. As a safety measure, the boiler may lock out to protect the system. What does the Vaillant F75 fault code mean? The Vaillant F75 fault code appears when

If your Vaillant boiler is showing the F22 fault code, it usually means the system has low water pressure. When the pressure drops too low, the boiler shuts down to protect itself, which can leave you without heating or hot water. In many cases, the issue can be solved by repressurising the boiler using the

A Vaillant F29 fault code usually means the boiler has lost its flame during operation or failed to ignite properly. When this happens, the boiler shuts down as a safety precaution, which can leave you without heating and hot water. Sometimes the fault is only temporary and clears after a simple reset. However, if it

This guide explains Baxi boiler L fault codes and what they usually mean, from lockouts and ignition problems to overheating and circulation issues. You’ll learn the common causes, the safe checks you can try first (pressure, controls, a single reset, bleeding radiators), and when the fault needs a Gas Safe engineer so your heating and