Knowing how to reset your boiler is an essential skill for homeowners and tenants alike. When your boiler unexpectedly shuts down, leaving you without heating or hot water, a simple reset can often resolve the issue.
In this guide, our heating engineers in Bury, Ramsbottom and Rossendale will walk you through the process of resetting your boiler, covering pre-reset checks, step-by-step instructions for various boiler models, and what to do if the reset doesn't solve the problem.
What causes a boiler to be reset?
Boilers are designed with safety features that cause them to shut down when they detect potential issues. This protective measure, known as a lockout, prevents damage to the system and ensures user safety. Common faults that lead to a boiler lockout include:
High pressure
If the pressure within the system exceeds safe levels, typically above 3 bar, the boiler will shut down.
Gas supply issues
Interruptions or fluctuations in the gas supply can trigger a safety lockout.
Error codes
Modern boilers display specific error codes that indicate various faults, prompting a shutdown.
Ignition failure
If the boiler fails to ignite after several attempts, it will enter a lockout state.
Overheating
When internal components reach unsafe temperatures, the boiler will shut off to prevent damage.
Pre-Reset Checks
Before attempting to reset your boiler, perform these essential checks:
Power supply: Inspect your fuse box or circuit breaker to ensure there are no electrical issues. Look for tripped switches or blown fuses.
Boiler pressure: Locate the pressure gauge on your boiler. The ideal pressure range is between 1 and 2 bar. If the pressure is too low or too high, address this issue before resetting.
Error codes or flashing lights: Consult your boiler manual to interpret any error codes or flashing light patterns. These indicators can provide valuable information about the underlying problem.
Step-by-Step Guide to Resetting Your Boiler
General Steps
Locate the reset button
Refer to your boiler manual for the exact location. It's typically marked with a red button or a flame symbol.
Press and hold the reset button
Generally, hold for 10 seconds, but this may vary by model. Consult your manual for specific instructions.
Wait for the boiler to start up
Allow 2-3 minutes for the system to restart. Look for signs of successful reset, such as flame ignition or steady indicator lights.
Model-Specific Reset Instructions
Worcester Boiler
- Press and hold the reset button for 3-5 seconds.
- Alternatively, use the thermostat dial method: Turn the dial to a minimum, wait 5 seconds, and then turn it back to its original position.
Vaillant Boiler
- Locate the reset button on the display screen.
- Press and hold for 3 seconds.
Baxi Boiler
- Press and hold the reset button until the red light turns off.
- For some models, use the ON/OFF/SELECTOR switch method: Turn the switch to OFF, wait 5 seconds, then turn it back to ON.
Vokera Boiler
- Move the mode selector switch to the 'OFF/RESET' position.
- Wait for 5 seconds, then move it back to the normal operating position.
Glow-worm Boiler
- Press the reset button and wait for 5 seconds.
- The boiler should attempt to reignite.
What to Do If Resetting Doesn't Work
If your boiler fails to restart after multiple reset attempts, it's likely indicative of a more serious underlying issue. In this case:
Check for persistent faults
Look for recurring error codes or unusual noises that may suggest a specific problem.
Call professional plumbers in Ramsbottom, Rossendale and Bury
Contact a Gas Safe registered engineer to diagnose and repair the fault. Attempting complex repairs yourself can be dangerous and may void your warranty. Simply call us on 01204 888255 and we'll be happy to help.
