How to Repressurise a Baxi Boiler: A Step-by-Step Guide
A Baxi boiler can sometimes lose pressure, which may leave your radiators cold and your hot water supply low. When the pressure in a Baxi boiler is too low, it typically triggers Error Code E119. This E119 error code means that the water pressure is too low for the boiler to work safely and efficiently.
When pressure is low on Baxi boilers, you can see your central heating system is not working and boiler pressure gauge indicates red zone. Luckily, repressurising your boiler is a quick task that you can perform yourself, without needing a professional.
Why Does My Baxi Boiler Keep Losing Pressure?
Your boiler might lose pressure due to a few reasons:
- Small leaks in the heating system, if you see any signs of water
- Bleeding radiators can cause a loss of water.
- System maintenance that involves draining or releasing water can lower pressure. If you see this happening often, it might be a sign of a bigger problem. It’s a good idea to get a professional inspection.
Steps to Repressurise a Baxi Boiler
Time needed: 5 minutes
Steps to Repressurise a Baxi Boiler
- Turn off the boiler
Before starting, make sure the boiler is switched off and cooled down for safety.
- Locate the pressure gauge
This is a small dial on your boiler with green and red zones. If the needle is below the green zone (1-1.5 bar), it’s time to repressurise.
- Find the filling loop
The filling loop is a flexible silver pipe with two small taps. One connects to the cold water supply, and the other to the heating system.
- Open the valves
Slowly open the valves on both ends of the filling loop to let water enter the system.
- Monitor the pressure
Keep an eye on the pressure gauge as the water enters. When the needle reaches between 1 and 1.5 bar (within the green zone, which is operating pressure), stop.
- Close the valves
Close the valves tightly, once the correct pressure is reached
- Turn the boiler back on
Your boiler is now repressurised. Switch it on and check that it’s working properly.
- Check for leaks
After turning it on, inspect the area around the valves for any water leaks.
How to Adjust Pressure on a Baxi Boiler
If your boiler’s pressure is too high (over 2.5 bar), you can reduce it by bleeding a radiator. This process releases excess water from the system, which will lower the pressure back to normal levels.
How to Increase Pressure on a Baxi Boiler
If the pressure drops below 1 bar, follow the repressurising steps above to increase it. Always make sure you do this gradually to avoid overfilling the system.
Common Issues with Low Boiler Pressure
- Leaks: Even small leaks can cause a drop in pressure.
- Air in the system: Air that gets trapped in radiators will need to be bled out, which can cause pressure to drop.
- Regular pressure loss: If your boiler often loses pressure, it may indicate a problem that needs a professional’s help.
Final Tips
- Regularly check your boiler’s pressure to avoid disruptions.
- If you’re unsure or uncomfortable repressurising, consult a professional or refer to your Baxi boiler manual.
You can keep your home warm by watching your boiler’s pressure and acting quickly when it drops. This helps your system run well all year long. If you find low pressure often we recommend a qualified heating engineer visit. You can find Baxi expansion vessel here.
