No code
Temperature and inlet issues
Worcester Bosch Greenstar Heatslave II External
Cause 212 (Blocking)
Safety or flow temperature rises too high. Air lock or reduced water content.
Cause 359 (Blocking)
DHW outlet or storage tank exceeds 90°C. Pump & burner are blocked until temperature drops to <89°C.
Cause 380 (Blocking)
Inlet DCW temperature higher than DHW outlet temperature. The output is blocked until the inlet temperature drops below the output temperature.
This code also applies to: