If a fault is found to be on your wiring or equipment then your service provider will charge you for an engineer to attend and fix the problem. If you are unsure of where the fault lies or how to check this, it may be cheaper for one of our engineers to attend to diagnose the problem. If the fault is on your wiring we can fix it there and then, if the fault is on the Openreach network, your service provider will not charge you for fixing the fault.