E13
FAULT CODE
Potterton
Differential Water Flow Switch — Remains Closed
Medium Severity
Engineer Required
The differential water flow switch is stuck in the closed position. Indicates a faulty switch or wiring issue.
Step-by-Step Fix Guide
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Step 1 Engineer only
Call a Gas Safe engineer to test and replace the flow switch if necessary
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.