BoilerFaultCodesWhat the manual says
Manufacturer manualLow system pressure – increase the system pressure to 0.8 bar
What causes this fault?
This fault occurs because the internal sensors have detected that there is not enough water inside the central heating system to circulate safely. The most common reason is a minor leak in the pipework or radiators, though it can also happen if air was recently bled from your radiators without the pressure being topped up.
This issue is frequently seen at the start of autumn when homeowners turn their heating back on for the first time after the summer break.
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 HJ-09: no call-out fees, no surprise bills.
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