BoilerFaultCodesYour heating cannot circulate around your home because the main pump has stopped working or is not responding.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: No CH or No CH1 Pump
What causes this fault?
This fault occurs when the boiler's internal computer detects that the central heating pump is either completely stuck or not communicating properly. The most common reason is that the pump has seized due to a buildup of debris in the system water or an electrical failure within the pump's motor. Without this component spinning, the boiler cannot move hot water to your radiators and must shut down to prevent overheating.
This issue is frequently seen at the start of autumn when heating systems are turned on for the first time after being inactive all summer, which can cause internal pump components to seize.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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