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Return flow temperature too low-L5

Ideal L5 Fault: Return Flow Temperature Too Low

HeatingBy adminJune 21, 2025Leave a comment

When your Ideal boiler is showing L5, it’s alerting you to a problem with the return flow temperature-specifically, that it’s too low for safe operation.

Ignition lockout-L3

Ideal L3 Error: Ignition Lockout Fault Explained

HeatingBy adminJune 20, 2025Leave a comment

If your Ideal boiler is showing L3, it’s displaying the L3 fault code, which is a type of boiler fault.

Main PCB error-F64

Vaillant F64 Fault: Main PCB Error Explained

HeatingBy adminJune 19, 2025Leave a comment

The Vaillant F64 error code points to a serious issue with the Main Printed Circuit Board (PCB)-also known as the boiler’s PCB-housed within the electronics box of your boiler.

Pump Failure on Air in System-F24

Vaillant F24 Error Code: Pump Failure or Air in the System

HeatingBy adminJune 18, 2025Leave a comment

The Vaillant F24 error code is a common warning on many Vaillant boilers, particularly Vaillant combi boilers.

Flow and return temperature sensors discrepancy-F23

Vaillant F23 Error: Flow and Return Sensor Fault Explained

HeatingBy adminJune 17, 2025Leave a comment

The Vaillant F23 error is a common boiler fault code that occurs when there’s a significant temperature difference between the flow and return pipes in your heating system.

Flow temperature sensor fault-E6

Worcester E6 Error: Hot Water Sensor Fault & How to Fix It

HeatingBy adminJune 16, 2025Leave a comment

The Worcester E6 error indicates a fault with the hot water sensor in your boiler-an essential component that helps maintain safe and consistent hot water temperatures.

Flow temperature sensor fault-E5

Worcester E5 Fault: Flow Temperature Sensor Error Explained

HeatingBy adminJune 14, 2025Leave a comment

Seeing the Worcester E5 error on your boiler display? This is a Worcester Bosch boiler error that indicates a fault with the flow temperature sensor-a key component responsible for monitoring the temperature of the water circulating through your heating system.

Fan or Flue Fault-C4

Worcester C4 Error: Fan or Flue Fault Explained and Fixed

HeatingBy adminJune 13, 2025Leave a comment

If your boiler is displaying the Worcester C4 error, it’s alerting you to a fan or flue fault-both of which are critical to safe and efficient boiler operation.

Low Water Pressure-E119

Potterton E119 Error: Low Water Pressure Issue Explained

HeatingBy adminJune 12, 2025Leave a comment

If your Potterton boiler is showing the E119 error, you’re dealing with a low water pressure fault-a common issue that can affect both heating and hot water supply.

Low Water Pressure-E119

Baxi E119 Fault: How to Fix Low Pressure on Your Baxi Boiler

HeatingBy adminJune 11, 2025Leave a comment

If you’re seeing the Baxi E119 fault on your boiler’s display, it means your central heating system is suffering from low water pressure.

Flow temperature overheat or lack of water flow-L1

Ideal Boiler L1 Error: Flow Temperature Overheat or Low Water Flow

HeatingBy adminJune 10, 2025Leave a comment

If your Ideal boiler is displaying the L1 error code, it’s alerting you to a flow temperature overheat or a lack of water flow—this is an ideal boiler fault code and a boiler fault designed to protect the boiler’s components.

Boiler overheating-F20

Vaillant F20 Error: What It Means and How to Fix It

HeatingBy adminJune 9, 2025Leave a comment

The Vaillant F20 boiler error is a common fault that indicates your boiler is overheating. The Vaillant boiler displays the F20 code as part of its diagnostics to alert you to this issue.

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0800 Homefix Ltd
85 Great Portland Street
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London
W1W 7LT

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