E2
Flow sensor errors
Worcester Bosch Greenstar Heatslave II External
Cause 222 (Blocking)
Flow sensor short circuit. Flow sensor shorted or damaged.
Action
Reset
Cause 223 (Blocking)
Flow sensor open circuit. Flow sensor disconnected or damaged.
Action
Reset
Cause 233 (Blocking)
HCM (Heat Control Module). HCM Code plug missing or defective.
Action
Reset
This code also applies to: