Medium
2.7bar on Saunier Duval Thelia

Your boiler's internal water pressure is currently too high, which can put unnecessary strain on the system's internal components.

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

Upper water pressure (>2.7b)

From this model's manual
Verified against the Saunier Duval/Saunier Duval Thelia 23e installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate a radiator in your home that is easy to access.Open the radiator bleed valve slowly with a key until water begins to drip out.Allow a small amount of water to drain into a bowl until the boiler's pressure gauge drops back into the green zone (usually 1.0 to 1.5 bar), then tightly close the valve.

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All 19 fault codes on the Thelia

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

0.5bar010205060911121314151617181920F1F4

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