TradeAssistIQHome

Worcester Bosch Greenstar 4000 Combi fault 2961

No fan signal available

Gas boiler

What it means

No signal detected from the fan.

Likely causes

  1. Loss of mains voltage to fan
  2. Damaged fan harness
  3. Faulty PWM signal
  4. Faulty fan
  5. Faulty PCB

Where to start

  1. Check the mains voltage to the fan
  2. Check the fan harness for continuity
  3. Check the pulse width modulation (PWM)

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 78), right under the answer
Ask about 2961 freeCreate a free account

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.

Other Worcester Bosch Greenstar 4000 Combi fault codes