How to Turn Off Air Purge Mode on a Worcester Boiler
If your Worcester boiler is stuck in air purge mode, it might seem like something’s wrong but don’t worry. This mode is actually normal and is designed to clear air out of the system after installation or maintenance. Still, if your boiler is taking too long or you need to reset it, you might want to turn it off early. Here’s how to do that safely.
What Is Air Purge Mode?
Air purge mode helps your boiler get rid of trapped air in the heating system. It usually runs automatically for a few minutes. This keeps your system working smoothly and stops air bubbles from causing problems with heating or hot water.
Why You Might Want to Turn It Off
Most of the time, it’s best to let air purge mode finish by itself. But there are times when you may want to stop it early:
- The boiler is stuck in the mode for longer than normal
- You need to reset the boiler after maintenance
- You think there might be a fault or sensor issue
How to Turn Off Air Purge Mode
Time needed: 5 minutes
Follow the given below steps to turn off purge mode
- Check the Display
Look at your boiler’s screen to see if it shows a message or code for air purge mode (common on Worcester Greenstar models).
- Let It Finish (Recommended)
If you can, wait for around 15 minutes. The boiler should finish the process on its own.
- Use the Reset Button
To stop the boiler, locate the reset button on the front panel, then press and hold it for around 5 seconds before releasing. The boiler should restart and exit air purge mode.
- Turn Power Off and On
If resetting doesn’t work, turn the boiler off at the switch and wait around 30 seconds. Then turn it back on and check if it restarts normally.
- Check the Manual or Get Help
If it keeps going back into air purge mode or won’t start properly, check your user manual or call a professional. A sensor might be faulty, or air could still be stuck in the system.
When to Call a Gas Safe Engineer
You should call a Gas Safe registered engineer if:
- The boiler won’t stop air purge mode even after reset
- The boiler shows error codes or won’t start at all
- You smell gas or see signs of a leak
- You’re unsure or not confident in handling the boiler
Boilers involve gas and water pressure, so it’s always safer to get a qualified professional if anything seems wrong.
Final Tips
- Don’t rush the process air purge mode is part of normal boiler function
- Always check the boiler pressure after restarting
- Get your boiler serviced yearly to avoid future problems
Conclusion
Turning off air purge mode on a Worcester boiler is easy with a simple reset, but it’s best to let it finish on its own when possible. If problems continue or you feel unsure, call a Gas Safe engineer to keep your home safe and your boiler working properly.
Frequently Asked Questions
Worcester Bosch air purge mode typically lasts between 9 to 15 minutes after repressurising or restarting the system. During this time, the boiler will intermittently run its pump without igniting, safely expelling trapped air from the pipework.
An air purge mode is a built-in automated cycle on modern boilers that intermittently pulses or continuously runs the system’s pump to push trapped air out of the pipes, heat exchanger, and radiators. This allows the air to reach the Automatic Air Vent (AAV) to safely escape the system.
An air purge on a Worcester boiler is an automated function that cycles the pump on and off without firing the burner to push trapped air out of the system. This cycle runs for 10–15 minutes and often triggers automatically upon first startup, after a power outage, or after a system refill.
