H00.00 Low

Remeha H00.00 Fault Code

Also written as H0000 — same fault.

The Remeha H00.00 fault code means: your boiler is currently taking a short break from operating, but it will attempt to restart itself automatically once the underlying issue resolves.. It appears on 1 Remeha 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: Blocking: The boiler starts up again automatically when the cause of the blocking has been rectified. A blocking can become a lock-out.

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 H00.00 fault code

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

Source

Remeha H00.00 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