BoilerFaultCodesYour boiler has detected a problem with how it discharges fumes or takes in fresh air, causing it to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Go to section 'D'
What causes this fault?
This fault occurs when the boiler's internal safety sensor detects that waste gases are not being cleared from the system or fresh air is not being pulled in correctly. The most common reasons are a build-up of dirt in the narrow plastic tubes inside the boiler, a failing fan, or a blockage in the flue pipe leading outside.
This issue is more frequent during periods of high winds, as strong gusts can push back against the flue and disrupt the air pressure readings.
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 neons flashing (Air pressure switch) — no call-out fees, no surprises.
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Potterton Performa 30 HE 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.
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