PUMP FAULT
FAULT CODE
Myson
Pump Not Running
High Severity
Engineer Required
The circulation pump is not running. On Marathon models the pump is internal.
Step-by-Step Fix Guide
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Step 1
Check the pump is not seized — it may need manual freeing after summer
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Step 2 Engineer only
A Gas Safe engineer should check pump wiring and operation
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.