L4
FAULT CODE
Firebird
Low Water Pressure
Low Severity
DIY Check Possible
System water pressure is below the minimum.
Step-by-Step Fix Guide
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Step 1
Repressurise via the filling loop to 1.0-1.5 bar
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Step 2
Reset the boiler
Gas Safe Reminder
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.