BoilerFaultCodesDaikin 14 Fault Code
The Daikin 14 fault code means: your boiler has detected trapped air in the pipes or a fault with the sensor that monitors water temperature, causing the system to stop working to avoid overheating.. It appears on 3 Daikin models in our database.
Technical description: Sensor fault S1: Air in the installation. Purge the air from the boiler and CH installation. Check the connection of the ntc on the hot water tube. Check wiring for break. Replace S1.
DIY fix possible
Check the system pressure is between 1.0 and 1.5 barBleed all radiators in the house to release trapped airLocate the manual air vent on the boiler to ensure air is purgedReset the boiler by pressing the reset button
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Daikin models that show the 14 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Daikin 14 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