First of all I am a qualified electrician, but just want to be belt and
brasses on this.

My Mums Ravenhead CSI 85 Condensating Combi Boiler is coming up with
a RED light fault indicating poor air circulation.

I removed the internal cover from the boiler to check the fan was
running, which it was, but there is a nylon hose from the pressure
switch that is hanging in free space and looks as if it has come out of
the socket that is mounted adjacent to the fan impellor ? I cant really
see this switch making unless this nylon pipe was inserted into the
socket.

Can anyone just confirm my assumption.

Thanks.

Rick.