E55
FAULT CODE
Potterton
Calibration Required
Medium Severity
Engineer Required
The boiler requires calibration — this code appears on auto-calibrating models when the combustion setup needs to be verified or adjusted.
Step-by-Step Fix Guide
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Step 1 Engineer only
Call a Gas Safe engineer to carry out the calibration procedure using the appropriate service tool
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.