Boiler error codes
Boiler error codes can help point you in the right direction when your heating or hot water stops working. Use our guide to check common boiler fault codes, understand what they may mean, and know when to request support from MyHomeCover.
Before you call
- ✓Write down the exact error code shown on the boiler.
- ✓Check whether you still have heating, hot water or both.
- ✓Make a note of any noises, leaks or pressure changes.
- ✓Do not remove the boiler casing or attempt internal repairs.
- ✓Contact us if the fault is covered under your plan.
Smell gas or suspect carbon monoxide?
If you smell gas, suspect a gas leak or think there may be a carbon monoxide issue, do not try to reset or repair the boiler. Leave the property if needed and call the National Gas Emergency Service immediately.
Call 0800 111 999Check common boiler error codes
Enter your boiler make, model and error code to see a possible meaning and the safest next steps. Error codes vary by exact model, so this tool should be used as guidance only.
Result
Your boiler error code result will appear here.
Possible meaning
Safe next steps
Find your boiler brand
Different manufacturers use different fault codes. Use the sections below as a starting point, then check your boiler manual or contact our team if you need help.
Worcester Bosch
Codes linked to ignition, water pressure, sensors, flow temperature or condensate issues.
Baxi
Codes can relate to flame failure, circulation, pressure faults, sensors or condensate pipes.
Ideal
Codes may show ignition lockout, low pressure, overheating, fan issues or sensor faults.
Vaillant
Codes can point towards pressure, ignition, flame detection, sensors, pump or controls.
Glow-worm
Codes may relate to pressure loss, ignition failure, overheating, condensate or sensors.
Alpha
Codes can indicate ignition issues, pressure faults, overheating, circulation or components.
What boiler error codes usually mean
Error codes do not always tell the full story, but they can help identify the type of problem your boiler has detected.
| Fault type | What it may mean | What to do next |
|---|---|---|
| Ignition or flame fault | The boiler may have failed to light or may not be detecting a flame correctly. | Do not keep repeatedly resetting the boiler. Contact support if the fault continues. |
| Low pressure | The heating system pressure may have dropped below the boiler’s required level. | Check the pressure gauge. If pressure keeps dropping, there may be a leak or system fault. |
| Overheating | The boiler may have detected excessive temperature or poor circulation. | Switch off the appliance if advised by the manual and seek qualified support. |
| Sensor fault | A temperature, pressure or safety sensor may not be reading correctly. | This usually needs diagnosis by a qualified engineer. |
| Condensate issue | The condensate pipe may be blocked or frozen, especially in cold weather. | Check your manual for safe guidance. Do not open the boiler casing. |
| Fan, pump or circulation fault | An internal component may not be operating correctly. | Do not attempt internal repairs. Contact qualified support. |
Safe checks you can make
Before requesting help, you may be able to gather useful information without touching anything inside the boiler.
- ✓Check the exact error code on the display
- ✓Check whether the boiler has power
- ✓Check whether heating, hot water or both are affected
- ✓Check the pressure gauge if your boiler has one
- ✓Check your thermostat and programmer settings
What not to do
Some boiler faults can be dangerous or can cause more damage if handled incorrectly.
- !Do not remove the boiler casing
- !Do not attempt gas, electrical or internal repairs
- !Do not keep resetting the boiler repeatedly
- !Do not ignore leaks, burning smells or unusual noises
- !Do not use the boiler if you suspect it is unsafe
How MyHomeCover can help
If your boiler has an error code and the issue falls within your plan, our team can guide you through the next steps and arrange engineer support where appropriate.
| Your situation | How we help | Useful page |
|---|---|---|
| You have an active plan | We check your plan, review the fault and confirm whether a repair visit can be arranged. | How Repairs Work |
| You are comparing cover | You can compare Smart Cover, Smart+ Cover and Total Home Cover. | View Cover Plans |
| You need to report a fault | Send us your details, error code, postcode and a description of the problem. | Contact MyHomeCover |
Common boiler error code questions
Straightforward answers about boiler fault codes, resets, pressure issues and when to request help.
What is a boiler error code?
A boiler error code is a message shown on the boiler display when the appliance detects a fault or safety issue. The exact meaning depends on the boiler brand and model.
Can I reset my boiler?
Some boiler manuals include a reset process for certain faults. However, if the error code returns, do not keep resetting the boiler repeatedly.
Does a boiler error code mean I need a repair?
Not always. Some codes may relate to pressure, settings or temporary faults, while others may need professional diagnosis.
Is low boiler pressure dangerous?
Low pressure is common and may stop the boiler working correctly. If pressure keeps dropping, there may be a leak or another system issue.
What should I do if I smell gas?
If you smell gas or suspect carbon monoxide, do not reset or repair the boiler. Call 0800 111 999.
Boiler showing an error code?
Contact MyHomeCover with your boiler make, model, error code and postcode. Our team will check your plan and guide you through the next steps.