How can the fan be repaired? Do I need a new circuit board?
The fan doesn`t switch on before the burner fires up. Also, when the boiler switches off, the fan doesn`t clear the exhaust gases before it fires up next time. This causes a build up of fumes and the odd explosion. The boiler is a Myson Velaire Vitesse 40/50 boiler.
Martyn Jones, January 2012
