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Worcester Bosch Greenstar 4000 Combi fault 214

Fan shut down during safety time

Gas boiler

What it means

Locking fault (Category V). Fan shut down during the safety time period.

Likely causes

  1. Fan fault
  2. Fan harness wiring fault
  3. Power modulation fault on fan
  4. Defective PCB

Where to start

  1. Reset the appliance.
  2. Create a heat demand; check if the boiler fires up.
  3. Check the voltage to the fan and the continuity of the fan harness.

The full answer, free

  • 1 more check in order
  • How to put it right, step by step
  • The manual page for this fault (page 72), right under the answer
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Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.

From the Worcester Bosch manual for the Greenstar 4000 Combi. Check the model on the data plate before you order parts.

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