Medium
Er.14 on Vaillant Turbomax Pro 28 2E

Your boiler is struggling to detect the correct water pressure needed to run, likely due to a faulty sensor reading.

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

Pressure gauge

From this model's manual
Verified against the Vaillant Turbomax Pro 28 2e 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.

Engineer required

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

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