ABSTRACT
There is one important rule with fault finding on new central heating systems that are just being commissioned, and that is to always check electricians their wiring first, before looking for faulty components. The room thermostats can be seen as simple adjustable switches that just turn on the central heating when the temperature drops below the set level, they are a little more complicated than that. Many room thermostats have what is known as an anticipator fitted, which is a small heater that operates when the system is calling for heat. Most modern heating fluid-filled heating systems rely on a pump that is used to circulate the heated fluid around the system. Heating pumps are very reliable but, of course, as with any mechanical/electrical component they occasionally stop working. Motorised valves are valves that open and close electrically. There are two-port valves that just open to allow water to flow, and close to prevent the flow of water.
