F13 Fault Code Glow-worm Boiler

Boilers are machines. Even the most reliable and well-maintained boilers can encounter issues from time to time.

Let's find out what the F13 error code is in the Glow-worm boiler.

🔍 What is the F13 error code?
[Main PCB Connection Fault]
The F13 fault means there's a communication issue inside your boiler, usually between the main control board, a sensor, or some wiring. Think of it like your boiler’s brain trying to talk to its sensors — but the message isn’t getting through. When this happens, the boiler shuts itself down to stay safe and avoid any damage.


🛠️ Possible Causes:

Let's see what causes the F13 error.

[FAULTY OR DAMAGED SENSOR]
First up — a faulty or damaged sensor. Sensors help your boiler monitor safety and performance. If they’re not working right, they might send the wrong data to the PCB and trigger an F13.

[CHECK WIRING HARNESS]
Next, check the wiring harness. It’s what allows all your boiler parts to talk to each other. Loose, corroded, or damaged wires can interrupt this connection, and that can cause your boiler to shut down.

[PCB FAILURE]
The PCB — or printed circuit board- is like the brain of your boiler. If it’s faulty, it can’t process sensor data properly. Unfortunately, PCB failure is one of the more expensive causes of the F13 error.

[LOOSE CONNECTIONS]
Finally, don’t overlook loose internal connections. A few loose ends can easily throw your whole system off balance.


🔧 How to Troubleshoot:

Let's find out how to fix the F13 error code.

[CALL A GAS SAFE ENGINEER]
Step one—call in a certified Gas Safe engineer. The F13 fault usually points to issues with the boiler’s temperature sensors, wiring, or control board. At Serviceteam, our experts are trained to diagnose and fix Glow-worm faults safely and efficiently.

[DIAGNOSTIC TESTS]
Once on-site, the engineer will carry out a full diagnostic check, inspecting sensors, checking wiring, and evaluating the boiler’s PCB.

[REPLACE FAULTY COMPONENTS]
If any components like the sensor or PCB are faulty, they’ll be replaced with genuine Glow-worm parts to ensure long-term reliability.

[RESET THE BOILER]
After repairs, the engineer will restart the boiler, check for error codes, and confirm that everything’s running smoothly and safely.


🏢 About Us:

At Serviceteam, our team of skilled Gas Safe engineers handles every make and model of gas and electric boilers. As a professional boiler installer, we meet the manufacturer's high standards and provide exceptional service and peace of mind.


📞 Need Help?

We guarantee to meet the highest standards set by the manufacturer.

We hope this video has been helpful. Click on the link below to book a Serviceteam heating engineer. Thanks for watching, and stay warm!

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