117
FAULT CODE
Baxi
Water Pressure Too High
Medium Severity
Engineer Required
System water pressure has exceeded the safe maximum — likely above 2.9 bar. Do NOT add more water.
Step-by-Step Fix Guide
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Step 1
Do NOT add more water to the system
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Step 2
Check the filling loop is fully closed
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Step 3 Engineer only
If pressure remains above 3 bar, call a Gas Safe engineer — the expansion vessel may need replacing
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.