F9 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 is the F9 error code in the Glow-worm boiler.
🔍 What is the F9 error code?
The F9 fault code on a Glow-worm boiler means there's an issue with the water pressure sensor. This sensor is important for keeping the right water pressure in the boiler system. If the sensor isn't working correctly or shows wrong readings, the boiler displays the F9 error code to avoid any further problems.
🛠️ Possible Causes:
Let's see what causes the F9 error.
[WATER PRESSURE ISSUES]
The F9 fault can be triggered by low or high water pressure. If your system's pressure falls outside the recommended range, your boiler can't operate safely. This can happen due to leaks in the system, which cause a drop in pressure, or blockages and airlocks that affect the water pressure.
[BLEEDING RADIATORS]
Bleeding your radiators can sometimes lead to pressure loss if too much water escapes. If you notice a drop in pressure after bleeding, re-pressurizing your system can help resolve the issue.
[FAULTY PRESSURE SENSOR]
Over time, the pressure sensor in your boiler may wear out or become faulty, giving incorrect readings. Loose or corroded electrical connections to the sensor can also affect its performance.
[INTERNAL BOILER ISSUES]
Other internal components, like the PCB (Printed Circuit Board), can also indirectly cause the F9 fault code. Additionally, debris or limescale buildup within the boiler can interfere with the sensor's ability to function correctly.
🔧 How to Troubleshoot:
Let's find out how to fix the F9 error code.
[CHECK THE PRESSURE]
First, check your boiler's pressure gauge. The ideal pressure should be between 1 and 1.5 bars. If the pressure is too low, you can increase it by adding water using the filling loop. Check your boiler's manual for specific instructions.
[REDUCE HIGH PRESSURE]
If the pressure is too high, bleeding the radiators can help. Use a radiator key to release excess air and lower the pressure.
[INSPECT FOR LEAKS]
Next, inspect your boiler and the surrounding area for any water leaks. Check all visible pipes, radiators, and joints. Fixing leaks can prevent pressure drops. If you find a leak, consider calling a professional for repairs.
[RESET THE BOILER]
Sometimes, a simple reset can clear minor faults. Refer to your boiler's manual on how to perform a reset. After resetting, keep an eye on the boiler to see if the F9 fault code reappears.
[CLEAN OR REPLACE THE PRESSURE SENSOR]
If the pressure sensor is dirty or faulty, it may need cleaning or replacement. Turn off the boiler and let it cool down. Disconnect the sensor's electrical connections and inspect it for dirt or damage. Use a soft brush or cloth to clean it. If the sensor is damaged, replace it with a new one.
[CALL A GAS ENGINEER]
Remember, boiler issues require an expert touch. Boilers are complex, and safety is paramount. Always call a professional Gas-safe engineer to fix your Glow-worm boiler’s F9 fault.
🏢 About Us:
At Serviceteam, our team of skilled Gas Safe engineers handles every make and model of gas and electric boilers. As Professional installers for Glow-worm boilers, we meet the manufacturer's high standards, providing 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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