E17
FAULT CODE
Biasi
Low Water Pressure
Low Severity
DIY Check Possible
The system water pressure is below the minimum operating level.
Step-by-Step Fix Guide
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Step 1
Check the pressure gauge — it should read between 1.0 and 1.5 bar
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Step 2
Use the filling loop to repressurise to 1.2 bar
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Step 3
Reset the boiler
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Step 4
If pressure keeps dropping, call a Gas Safe engineer to check for leaks
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.