High Lockout
E160 on Potterton Promax

Your boiler has stopped working because the fan that clears away waste gases is not spinning correctly or has lost communication with the control board.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Fan fault

What causes this fault?

This fault occurs when the boiler's internal computer detects that the fan is not spinning at the required speed to safely extract exhaust fumes. The most common reasons are a mechanical failure of the fan motor itself, a loose connection in the wiring, or a fault on the main control board preventing it from sending power to the fan.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

E161View →E133View →

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