Your boiler's main internal computer has developed a serious fault and is unable to safely control the flame.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: The burner control unit is faulty
What causes this fault?
This fault occurs when the boiler's main control board experiences a critical hardware failure or a loss of internal communication. It is typically caused by electrical component degradation over time or a loose connection in the internal wiring that prevents the computer from monitoring the safety of the flame. Because the boiler can no longer verify it is operating safely, it shuts down completely as a protective measure.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like F0280 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Worcester Bosch GB162 is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.