Low
1065 on Worcester Bosch Greenstar 8000+ GR8701iW 30 S

Your boiler's digital pressure sensor is either unplugged or malfunctioning, meaning the system cannot accurately read its internal water level.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

System pressure sensor faulty or not connected: 1. Check the water pressure sensor plug is connected. 2. Plug the connection plug on the water pressure sensor correctly. 3. Check the continuity of harness and replace if required. 4. Check the voltage to the pressure sensor and the return voltage to the pressure sensor. 5. Replace the pressure sensor.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Wb 47115 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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Related fault codes

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All 103 fault codes on the Greenstar 8000+ GR8701iW 30 S

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

200201202203204208214224227228229232233234235237238242244245246247248249250251252253254257258259262263265268269273281283284305306357358360362363604811815101010131017101810191022102310251037106810701071107210751076208529082910291429152916292029232924292529262927292829312940294629482949295029512952295529562957296129622963296529662968296929702971297229802981

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