E2
Flow sensor errors
Worcester Bosch Greenstar Heatslave II
Cause 222 (Blocking)
Flow sensor short circuit. Flow sensor shorted or damaged, reconnect or replace as required.
Action
Reset
Cause 223 (Blocking)
Flow sensor open circuit. Flow sensor disconnected or damaged, reconnect or replace as required.
Action
Reset
Cause 233 (Blocking)
HCM (Heat Control Module). HCM Code plug missing or defective. Refer to table 11, i22 and i23 to determine HCM number fitted
Action
Reset
This code also applies to: