Low
S.07 on Vaillant ecoTEC plus 424

Your boiler is simply finishing its cooling cycle after the heating or hot water has turned off, which is a perfectly normal part of its operation.

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.

What the manual says

Manufacturer manual

Heatingmode:Pumpoverrun

From this model's manual
Verified against the Vaillant/Vaillant Ecotec Plus 610 installation & service manual, page 32.
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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Avoid the next call-out bill

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Related fault codes

All 72 fault codes on the ecoTEC plus 424

Seeing a different code? Every code this model can display, in one place.

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