BoilerFaultCodesWhat the manual says
Manufacturer manualWater pressure error - You must top up the water pressure for your system
What causes this fault?
This fault occurs when the system lacks enough water to circulate safely, triggering a safety shutdown. The most common reasons are a slow leak in the pipework or radiators, or having recently bled your radiators without topping the pressure back up.
This is common in autumn when homeowners turn their heating back on for the first time and discover the pressure has naturally dropped over the summer.
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 E37: no call-out fees, no surprise bills.
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