BoilerFaultCodesECA F53 Fault Code
The ECA F53 fault code means: your boiler has detected a fault with the sensor that monitors the temperature of the exhaust fumes, causing it to stop running as a safety precaution.. It appears on 4 ECA models in our database.
Technical description: Error on Temperature Sensor for Flue Gas (blocking) — flue gas temperature sensor in short or open circuit; notify ECA authorised service
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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ECA models that show the F53 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
ECA F53 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.
- ECA Confeo Premix HCH manual (PDF)
- ECA Confeo Premix HM manual (PDF)
- ECA Confeo Premix HST manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026