BoilerFaultCodesWhat the manual says
Manufacturer manualFault on Pump or Low System Pressure
What causes this fault?
This fault occurs when there isn't enough water pressure or flow to safely move heat away from the boiler's internal components. The most common reasons are a simple drop in system pressure due to a small leak or bleeding radiators, or a mechanical failure where the internal pump has seized and can no longer push water around your home.
This issue is frequently seen in autumn when heating systems are turned back on after being idle all summer, which can cause the internal pump to stick or seize.
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.
Avoid the next call-out bill
A cover plan would handle faults like 27: no call-out fees, no surprise bills.
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