H02.12 Medium

Remeha H02.12 Fault Code

Also written as H0212 — same fault.

The Remeha H02.12 fault code means: your boiler is currently stuck in a waiting mode because it has not received the correct command from your thermostat or heating controller to start heating up.. It appears on 1 Remeha 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: Release Signal
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Remeha models that show the H02.12 fault code

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

Source

Remeha H02.12 fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

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