E119
FAULT CODE
Potterton
Low Water Pressure
Low Severity
DIY Check Possible
System pressure has dropped below the required minimum of 0.5 bar. Shared with Baxi boilers — Potterton and Baxi share the same fault code system.
Step-by-Step Fix Guide
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Step 1
E119 cannot be cleared by resetting — you must first increase the pressure
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Step 2
Find the filling loop and slowly open both valves until pressure reaches 1.0–1.5 bar
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Step 3
Close the valve and the boiler should restart
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Step 4
If pressure drops again quickly, 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.