Medium
19 on Remeha W40

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

Return temperature too high

From this model's manual
Verified against the Remeha Quinta Ace 45 installation & service manual, page 36.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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