Worcester Bosch · Greenstar Si Compact ErP

CF boiler fault code

Greenstar Si Compact ErP

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What CF means

Water pressure sensor not connected or short-circuit.

Gas Safe engineer: Contact a Gas Safe registered engineer.

If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.

Safe check

Note the code. Do not open or adjust the boiler, or repeatedly reset it. Contact a Gas Safe registered engineer.

When to contact an engineer

Contact a Gas Safe registered engineer.

Source and provenance