BoilerFaultCodesYour boiler has detected that there is not enough water in the system to operate safely, causing it to shut down to prevent damage.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Low Pressure Error
What causes this fault?
This fault occurs when the water pressure inside your heating system drops below the minimum level required for the boiler to pump heat around your home. The most common reasons for this are a leak somewhere in your radiators or pipework, or recent maintenance where air was bled from the system without topping the water back up.
This issue is frequently seen in autumn when homeowners turn their heating back on for the first time and find that pressure has naturally seeped out over the summer months.
DIY fix possible
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Open the one or two taps on the loop slowly until you hear water flowing.Watch the pressure gauge until it reaches 1.5 bar, then close the taps tightly.Press the Reset button on the boiler display to clear the error.
Find a Gas Safe engineer
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Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like Low Pressure Error — no call-out fees, no surprises.
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Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
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