High
1 06 on Ariston Genus HE

Your boiler has detected that water is returning to the unit hotter than it was sent out, which usually means the water isn't moving through your radiators properly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Insufficient circulation — Trit >Tman+10°C for 3 times

From this model's manual
Verified against the Ariston Genus He installation & service manual, page 34.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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