Medium
F51 on ECA Confeo Premix HCH

Your boiler has detected a problem with the sensor connected to your solar heating system, which is causing the unit to stop operating as a precaution.

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

PT1000 Solar Sensor Error (blocking) — PT1000 solar sensor may be defective; press Reset; if persists notify ECA authorised service

Shared across the Confeo Premix P range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s 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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Related fault codes

F50View →F52View →

All 41 fault codes on the Confeo Premix HCH

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

123E01E02E03E15E16E17E18E33E35E38E44E64E65E80E82E83E98E99F05F07F10F13F34F36F37F39F40F41F42F43F47F49F50F52F53F81F201

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