BoilerFaultCodesDaikin 11 Fault Code
The Daikin 11 fault code means: your heating system is currently unable to read the temperature correctly because one of its internal probes has developed a fault or a loose connection.. It appears on 3 Daikin models in our database.
Technical description: Sensor fault S1
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Daikin models that show the 11 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Daikin 11 fault code information on this page is sourced and cross-checked against the official Daikin service / installation manuals for each affected model.
- Daikin Altherma Hybrid EHYKOMB33 manual (PDF)
- Daikin EKOMB 22 Combi manual (PDF)
- Daikin EKOMBG 22 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026