How much does it cost to fix Remeha error code 19.?

Typical repair cost for the Remeha 19. fault is £120-350 including labour.

19. High

Remeha 19. Fault Code

Q: What does the Remeha 19. fault code mean?

Your boiler has shut down because the water returning from your heating system is too hot, which prevents the unit from cooling itself down properly.

Also written as 19 — same fault.

The Remeha 19. fault code means: your boiler has shut down because the water returning from your heating system is too hot, which prevents the unit from cooling itself down properly.. It appears on 3 Remeha models in our database.

Technical description: Max. water temperature. Return temperature too high.

Typical repair cost £120-350 (including labour)

DIY fix possible

Check that at least two or three radiator valves are fully open to allow water to circulate.Ensure your external pump (if visible) is running and hasn't seized.Check if any bypass valves in your pipework have been accidentally closed.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

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 27 April 2026