78
FAULT CODE
ATAG
Water Pressure Out of Range
Low Severity
DIY Check Possible
The system water pressure is either too high or too low on ATAG boilers.
Step-by-Step Fix Guide
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Step 1
Check the pressure gauge — if below 1 bar, repressurise to 1.5 bar using the filling loop
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Step 2
If above 3 bar, do NOT add water — call a Gas Safe engineer
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Step 3
Reset after repressurising if needed
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.