will aim to get out to you same day if you ring before 1pm and all parts can be sourced next day if required. Not sure anyone else can offer that service...
HIVE is a great product. Simple installation, simple to use and gives excellent control over your system from anywhere in the world. It's also being constantly updated to give extra features and for £199 fully installed, they're giving them away.
Had this fault several times....when the fan is running constantly with no demand it is a faulty fan. Faults with the ignition sequence would result in fault codes being displayed....I think A1 for this boiler. Rather than waste money on a new fan I'd scrap the boiler and get a decent...