72 Medium

ECA 72 Fault Code

The ECA 72 fault code means: your boiler is having trouble reading the temperature in the middle of your hot water storage tank, which may affect how the system manages your hot water supply.. It appears on 1 ECA model in our database.

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.

Technical description: Storage tank temperature 3 (middle), sensor error
Typical repair cost £90-180 (including labour)

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 72 fault code

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

Source

ECA 72 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