610
FAULT CODE
Ariston
Thermal Fuse Open
High Severity
Engineer Required
The thermal fuse (a one-time safety device) has activated due to extreme overheating. Once blown, it cannot be reset — it must be replaced.
Step-by-Step Fix Guide
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Step 1
Turn off the boiler
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Step 2 Engineer only
Call a Gas Safe engineer — the thermal fuse will need replacing, but more importantly the root cause of the extreme overheating must be identified and fixed first
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.