Post originale di: oldturkey03 ,
Lindsey, not sure what boiler you have, the only info I got is for a Ferroli boiler. Again, there are numerous of those. If you can a model number would be helpful. On the Ferroli Optimax the F5 error code is: Fan problem • Tachometer signal interrupted, fan connection • Fan damaged, debris in fan Possible Solution • Check the wiring and fan • Check the fan, clean debris Hope this helps you to get started. Good Luck.