D1
Return sensor error / temperature too high
Worcester Bosch Greenstar 27-30 i System
Cause 240 (Locking)
Return sensor error. Sensor wet or damaged (the boiler will block for 300 seconds before this condition).
Action
Reset button
Cause 241 (Locking)
Return sensor error. Sensor disconnected or damaged (the boiler will block for 300 seconds before this condition).
Action
Reset button
Cause 286 (Locking)
Return temperature too high. Boiler overheat
Action
Reset button
Cause 240 (Blocking)
Return sensor short circuit. Wet sensor. Blocking for 300 seconds before going to Locking error (table 35).
Cause 241 (Blocking)
Return sensor disconnected. Blocking for 300 seconds before going to Locking error (table 35).
This code also applies to: