How To Fix Glowworm F10 Fault Code : Step-by-Step Guide
Is your Glowworm boiler showing fault code F10? Do not panic. Many homeowners face this issue, and in most cases, you can fix it without high repair costs.
Glowworm F10 Fault code means a fan fault. The fan removes harmful gases from your boiler. When the fan stops working, the system shuts down to protect your home.
This guide explains the causes and shows simple steps you can follow to fix the issue safely.
Table of contents
What Is Glowworm F10 Fault Code
Fault code F10 shows a problem in the fan system.
The fan helps remove combustion gases and supports safe boiler operation. If the fan fails, the boiler stops working to prevent risk.
What Causes Glowworm F10 Fault Code
Fan or Air Pressure Switch Fault
The most common cause is a fault in the fan or air pressure switch.
The fan motor can fail due to age or wear. Dirt, debris, or spider webs can block the fan and stop airflow.
The air pressure switch checks airflow. If it does not detect proper pressure, the boiler shows F10.
A blocked flue can also stop gases from leaving the system, which triggers the fault.
Other Contributing Factors
Other issues can also lead to this error.
A recent power cut may affect boiler settings. Extreme weather can block airflow.
Old components may stop working properly. Poor installation or lack of servicing increases the risk of faults.
How to Fix Glowworm F10 Fault Code
Time needed: 5 minutes
Follow the given below steps to fix Glowworm F10 Fault Code
- Reset Your Boiler
Locate the reset button on the front panel.
Press and hold it for 2 to 3 seconds. Release and wait for the boiler to restart.
Only reset once. If the fault returns, do not repeat this step. - Check Power Supply
Make sure your boiler has power.
Check your fuse box and confirm no power cut has affected the system. - Inspect Flue for Blockage
Check the flue outside your home.
Remove any visible debris like leaves or dirt. Clear airflow helps the fan work properly. - Listen for Fan Operation
Turn on the boiler and listen carefully.
If you do not hear the fan running, the motor may have failed. You will need professional repair.
When to Call a Gas Safe Engineer
Call an engineer if the reset does not fix the issue.
You should also get help if the boiler keeps shutting down or makes unusual noises.
Do not try to repair internal parts yourself. This can be dangerous.
How to Prevent F10 Fault Code
Regular maintenance helps prevent this problem.
Book annual servicing to keep your boiler in good condition. Clean components and proper checks reduce faults.
Keep the flue clear to allow safe airflow at all times.
Conclusion
Glowworm F10 fault code is common but often easy to fix.
Start with a reset and simple checks. If the problem continues, contact a qualified engineer.
Quick action keeps your home safe and your heating system running smoothly.
Frequently Asked Questions
F10 fault code indicates a problem with the central return flow thermistor in Glow Worm boilers. The fault commonly occurs due to a faulty temperature sensor or short circuit in the boiler system. Reset attempts may temporarily resolve the issue, but professional inspection is recommended for safety.
F1 – Indicates a fault with the ignition or gas supply. F2 – Indicates a fault with the flame. F3 – Indicates a problem with the fan or air pressure switch. F4 – Indicates a fault with the heat exchanger.
You can try basic steps like resetting the boiler and checking the flue for blockages. If the issue continues, you must contact a qualified Gas Safe engineer.
Yes. A blocked flue stops airflow, which prevents the fan from working properly. This triggers the F10 error.
