BoilerFaultCodesYour boiler has stopped working because it cannot confirm that the fan is spinning fast enough to safely clear exhaust fumes.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Incorrect signal from fan
What causes this fault?
This fault occurs when the boiler's internal computer detects that the fan is not spinning at the correct speed to safely expel waste gases. It is usually caused by a mechanical failure within the fan motor or a buildup of dirt and debris that prevents the blades from turning freely. In some cases, the plastic tubes that measure air pressure can become blocked or split, sending a false 'stop' signal to the system.
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 E29 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Vokera Hydra 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.