Boilers are usually trouble free generally speaking, however there may come a time when the boiler that you have fitted will show its age. They usually pick the most inconvenient time to show a fault, like the winter months. This will affect you in different ways and these faults could be with the control system, including things such as the thermostatic control/timer and even the valves and pipework. A good and regular service/maintenance schedule can help. This can be carried out by you or by a professional service like Swiss Cottage Plumbers with specialist boiler knowledge and relevant tools. Components are really quite specialized on modern boilers and need understanding. A trained plumber like a Swiss Cottage Plumber carries the correct tools and can logically fault find, diagnose, then repair or replace any defective parts that show up on an appliance. If you suspect you have a boiler problem you can visually inspect for obvious issues such as corrosion, leaks or faulty dials, but strongly consider the services of the professional to do the work, as their work will carry a bone fide guarantee.Listed below are some common reasons that might be responsible for the problems that can occur on a domestic boiler:1). Internal corrosion of system pipework. Caused by constant use and the effect of reaction between water and metal which causes sludge to form.2). Leaking pipework including valves and radiators cause drops in system pressure which transfer over to the boiler itself and affect its control.3). Leaving a property empty over an extended period of time, makes the revival of a boiler quite hard as everything especially the water has settled and sat for a long time just like a lot of things, your car perhaps?4). The old style of monitoring and control equipment such as thermostats will drastically affect performance and efficiency.