Your boiler has stopped working because the internal fan, which safely clears exhaust gases, isn't spinning at the correct speed.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Fan or Fan Wiring Fault
What causes this fault?
This fault occurs when the boiler's control board detects that the internal fan is either failing to start or is spinning at an incorrect speed. The most common reason is a mechanical failure within the fan motor or a communication breakdown between the electronic control board and the fan's wiring.
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 E160 — no call-out fees, no surprises.
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Potterton Promax System HE Plus 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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