Medium
30 on Atmos Intercombi HE32

Your boiler is struggling to detect the temperature of your hot water supply, which means it will likely stop providing hot water until the faulty sensor is fixed.

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

Sensor fault hot water sensor S3

From this model's manual
Verified against the Atmos Intercombi He32 installation & service manual, page 47.
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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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