Help needed on Ideal Logic Heat 15 System Boiler showing F3 error code

[malley]

Ideal Logic Heat 15 System Boiler
Hi. Just started to get an F3 Fan Fault on this boiler. On power up there seems to be a quiet thump from somewhere then it goes through the start up sequence. It spends a few seconds on the ‘c’ display before coming up with the F3 error code. Can anyone advise checks I can carry out to identify the problem. This is a system boiler so the pump is upstairs with the water tank. Thanks for your help

 

[Deleted member 120897]

Nothing you can check yourself as it states in the manual a fan fault