If your Keston boiler has stopped working and you're seeing a strange number or letter flashing on the display, don't panic. These are boiler error codes, a built-in system of diagnostics that informs you of the issue. While some issues can be resolved quickly with a reset, others may require the help of a professional. This guide covers standard Keston boiler error codes, their meanings, and the appropriate responses.
At Maintracts Services, we specialise in diagnosing and fixing boiler issues with speed and precision. Whether it's a minor reset or a complete system repair, our Gas Safe engineers are here to restore your comfort fast.
Need help right away? Book a boiler repair with Maintracts and speak to an expert heating engineer today. Contact us on 020 8682 2244 or email info@maintracts.co.uk for expert advice and assistance.
Behind every error code is a story your boiler is trying to tell. Understanding those signals early can mean the difference between a quick fix and a costly repair. With the right expertise, even the most complex issues become manageable.
What Is Keston Boiler Fault Codes?
Keston boilers, like many modern heating systems, come with an internal diagnostics system. When something goes wrong, the boiler stops functioning and displays a specific error code. These boiler diagnostics codes help users and engineers identify the cause of the fault, whether it's low pressure, ignition failure, or sensor issues.
Understanding these codes is the first step in troubleshooting your Keston boiler. It helps you decide if a simple reset will fix the issue or if it's time to call in a Gas Safe heating engineer.
Common Keston Boiler Error Codes And What They Mean
| Error Code | Meaning | Action |
| E01 | Ignition failure / Boiler flame loss | Try resetting the boiler. If the problem persists, book a Gas boiler repair in Keston. |
| E02 | Overheat lockout | Check for blocked radiators or airlocks. A service may be required. |
| E03 | Fan or air pressure fault | Check air intake and flue for blockages. Call a qualified engineer. |
| E04 | Low system pressure | Top up the pressure to 1.0-1.5 bar. Monitor for leaks. |
| E05 | Circulation fault | It could be a pump failure or airlock. It needs an engineer inspection. |
| E06 | Domestic hot water sensor fault | The sensor may need replacing. |
| F1 | Flame detection error | Resetting a Keston boiler may help. If F1 persists, consult an engineer. |
How To Fix A Keston Boiler
If your boiler is displaying a fault code:
- Check the pressure: Many faults, such as the E04 Keston boiler pressure fault, can be resolved by topping up your boiler pressure using the filling loop.
- Power cycle the boiler: Turn the boiler off at the mains for 30 seconds and turn it back on. This can sometimes reset minor electronic faults.
- Use the reset button: Most Keston boilers have a dedicated reset function. Follow the manufacturer's guide for resetting a Keston boiler.
- Inspect for apparent blockages: Check for vent blockages or external pipe freezes during cold weather.
Always refer to the official manual for your boiler model. If you're unsure, avoid tampering with the appliance and call a qualified professional.
Read more: glow-worm boiler error codes and Ariston boiler error codes to know more about the codes for a seamless experience.
When To Call A Gas Safe Engineer
Not all boiler faults are safe to handle yourself. You should contact a gas-safe registered heating engineer if:
- The boiler repeatedly displays an error code after reset
- You hear banging or gurgling sounds
- The boiler is leaking water or gas
- You smell gas in your home
- You experience constant ignition failures, like Keston E01 error fix attempts failing
In such cases, professional gas boiler repair services in London for Keston are essential. Ignoring warning signs can lead to more expensive repairs or complete system failure.
Book A Boiler Repair With Maintracts
If you're based in London and your Keston boiler isn't performing as it should, Maintracts Services is here to help. With over 40 years of experience, our engineers are trained in resolving Keston system boiler problems, including ignition faults, pressure issues, and advanced diagnostics.
We understand the urgency of a boiler not firing up in cold weather. Our team will diagnose and resolve faults efficiently, restoring heat and hot water to your home as quickly as possible.
Need help now? Book a boiler repair with Maintracts and get fast, expert support for your Keston boiler. Contact us on 020 8682 2244 or email info@maintracts.co.uk for expert advice and assistance. Get expert help exactly when you need it—without the guesswork.
FAQs About Glow-Worm Boiler Fault Codes
What do Keston boiler error codes mean?
They indicate a specific fault within the boiler's system, from ignition problems to pressure loss. Each code corresponds to a different issue.
How do I fix an E01 error on my Keston boiler?
E01 usually indicates ignition failure or flame loss. Try resetting the boiler. If the issue persists, contact a gas-safe engineer.
Why is my Keston boiler not firing up?
This could be due to a variety of issues, including low pressure, ignition faults, or sensor problems. Check the error code for more details.
How can I reset a Keston boiler?
Most Keston boilers have a reset button on the control panel. Press and hold it until the boiler restarts.
When should I call an engineer for a Keston boiler fault?
If the error code persists after a reset or if you're unsure about how to proceed, it's best to contact a Gas Safe engineer for safety reasons.
Call 020 868 22244
to speak directly to an
experienced professional.
Delivering customer
excellence since 1974.