Medium
S 80 on Ariston Genus Premium

Your boiler has lost communication with its wall-mounted thermostat, meaning it cannot accurately tell what temperature your rooms are.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Open circuit or short circuit on room sensor of the Clima Manager remote control

Shared across the range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check if the batteries in your Clima Manager remote control need replacingEnsure the thermostat is properly clicked into its wall bracketCheck for any loose or damaged wiring between the thermostat and the boiler

Find a Gas Safe engineer
Search the official register →
Boiler cover options

Avoid the next call-out bill

A cover plan would handle faults like S 80: no call-out fees, no surprise bills.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.

All 69 fault codes on the Genus Premium

Seeing a different code? Every code this model can display, in one place.

A17A18A19A20A21A22A33A97A98A99AA0011AA0022AA0033AA0077AA1199AA2200AA2211AA2222AA3333AA9999bb..BOILER SHUTDOWNdd..E 06E 07E 09E 10E 94E 95E04E05E08E20E21E22E23E56E64E66E74E99EE0033EE0044EE0055EE0088EE2200EE2211EE2222EE2233EE5566EE6644EE6666EE7744EE9999L.E.D. GPP/AAPP/LLS 02S 04S 05S 06S 25S 26S 27S 30S 31UU/FFUU/tt

Related guides you might find useful

Boiler won't turn on — 9-step checklist

Work through these before the call-out.

Read →

Yellow or orange flame — CO safety

Safety-critical — turn off, read this.

Read →

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →