PILOT OUT
FAULT CODE
Myson
Pilot Light Failure
High Severity
Engineer Required
The pilot light has gone out or will not stay lit. On Marathon models this is usually a thermocouple or gas valve issue.
Step-by-Step Fix Guide
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Step 1
Try relighting the pilot following the instructions on the boiler's front panel
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Step 2
If the pilot lights but does not stay lit, the thermocouple likely needs replacing
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Step 3
If no spark at all, the piezo igniter may be faulty
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Step 4 Engineer only
Call a Gas Safe engineer — do not attempt gas work yourself
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.