19 Medium

Remeha 19 Fault Code

The Remeha 19 fault code means: your boiler is detecting that the water returning from your radiators is hotter than it should be, suggesting a potential problem with your heating system's circulation or heat exchange.. It appears on 3 Remeha models 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: Return temperature too high
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 19 fault code

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

Source

Remeha 19 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