102 Low

ECA 102 Fault Code

The ECA 102 fault code means: your boiler's internal clock has lost its power backup, meaning your timed heating schedules may be lost or reset.. It appears on 1 ECA model in our database.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description: Lead time clock without backup
Typical repair cost £0-60 (including labour)

DIY fix possible

Reset the time and date on the boiler control panelCheck that the main power supply to the boiler remains switched onRestart the boiler to see if the internal battery recharges

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ECA models that show the 102 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

ECA 102 fault code information on this page is sourced and cross-checked against the official ECA service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026