APPLIANCE COMPLETELY SHUT DOWN High

Ariston APPLIANCE COMPLETELY SHUT DOWN Fault Code

Also written as APPLIANCECOMPLETELYSHUTDOWN — same fault.

The Ariston APPLIANCE COMPLETELY SHUT DOWN fault code means: your boiler has lost all power or cannot start up at all, leaving you without any heating or hot water.. It appears on 1 Ariston model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Main switch is on position “ON” but boiler does not operate; requires checking fuses, room thermostat, overheat thermostat (Ref. 15), and pump (Ref. 28)
Typical repair cost £100-350 (including labour)

DIY fix possible

Check if your home's main fuse box has tripped any switches.Ensure the fused spur switch next to the boiler is turned ON.Check if your room thermostat is set high enough to call for heat.Check if your prepaid gas or electric meter has credit.

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Ariston models that show the APPLIANCE COMPLETELY SHUT DOWN fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Ariston APPLIANCE COMPLETELY SHUT DOWN fault code information on this page is sourced and cross-checked against the official Ariston service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026