What the manual says
Manufacturer manualControl box is defective, (Analogue / Digital converter reference error).
From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar I 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 79 fault codes on the Greenstar i
Seeing a different code? Every code this model can display, in one place.
0.09U 233200201202203204208226235265268270283284305328356357358360363A1 281A7A7 808A8A8 361ACB1b7 257C1 / 264C4 / 273C4 237C6C6 / 215C6 / 216C7 / 214C7 / 217CC 800Condensate pump failedD4 341E2 / 222E2 / 223E2 / 350E2 / 351E9E9 / 276E9 224EAEA / 227EA 227EA 229EA 261EH 258F0 238F0 239F0 258F0 262F0 272F0 280F1 259F1 263F7F7 228FA / 306FA 306FdFd / 231H03H08H09H11H13h13/H13H29II -internal errort -