Medium
4) on Remeha Quinta 30

Your boiler is struggling to switch between heating your radiators and heating your hot water tank, which may result in a lack of hot water.

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

DHW mode: the three way valve or DHW pump activated (Broag priority only)

From this model's manual
Verified against the Remeha Quinta 30 installation & service manual, page 55.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

What causes this fault?

This fault occurs when the boiler's internal memory experiences a configuration error, meaning the control board no longer knows which specific model it is operating. This is usually caused by a sudden electrical surge, a failing memory chip, or a mistake made during the manual input of system settings.

Engineer required

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

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