Worcester Bosch Greenstar CDi Classic System ErP fault F0

Internal error

Gas boiler

What it means

An internal error has been detected in the boiler control system.

Likely causes

  1. Faulty electrical connector contacts
  2. Loose programmer inter-face module ignition leads
  3. Faulty PCB

Where to start

  1. Check electrical connector contacts
  2. Check programmer inter-face module ignition leads are not loose

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 52), right under the answer

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 CDi Classic System ErP. Check the model on the data plate before you order parts.

Other Worcester Bosch Greenstar CDi Classic System ErP fault codes