Fault code helper
Oil Boiler Fault Code Finder
Enter the appliance make, model, visible fault code and symptoms before sending a booking request. This helps the fault be understood before attendance.
Safe next step
Find what details to send before booking
This tool does not replace a proper diagnosis. It helps capture the useful details: make, model, fault code, symptoms and whether the appliance has locked out repeatedly.
Do not keep pressing reset after repeated lockouts.
Include the exact code and appliance model when you continue to the booking form.
What the code helps with
Useful details for Navien, Worcester Bosch, Grant, Firebird, Warmflow and oil range cookers
Fault codes vary by appliance and model, so the safest approach is to capture the code, symptoms and appliance details before deciding the next step.
Make and model
The exact boiler or cooker model helps narrow down parts, access and likely checks before attendance.
Visible code
Send the code exactly as shown, including letters, numbers, flashing lights or lockout messages.
Symptoms
No heat, no hot water, noisy running, smell, repeated lockout and reset history are all useful details.
Safe action
If the appliance smells, smokes, leaks oil or repeatedly locks out, stop using it and call for advice.
Ready to send details
The booking form now asks for the key details before it can be sent.
Name, address, postcode, email, phone, appliance make/model and fault details are required.