What the manual says
Manufacturer manualNo signal from the temperature sensor at the heating block available 1. Replace the temperature sensor. 2. Replace the connecting lead to the temperature sensor. 3. Replace the control unit.
From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 8000 Life System 2 installation & service manual.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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All 21 fault codes on the Greenstar 8000 Life GR8300iW 35 S
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