How Does a Gas-Powered Central Heating Boiler Work?


To the average homeowner, the inner workings of a central heating system are a bit of a mystery, and while we all know that the boiler heats up the water, which is then pumped around the system, that is the extent of most people’s knowledge. If you are one of those people, here is a brief but concise description of the inner workings of a gas boiler.

System Overview

Central heating system comprises of a boiler, a water tank and a lot of pipes that connect to the various radiators in each room of the house. This loop connection does not require water from the mains, as the water in the system is constantly recycled, from being hot, then cooling slightly as it is pumped back to the boiler, where it is reheated. When the central heating malfunctions, there is affordable boiler repair, service and installation by Bury based gas engineers who have a wealth of practical experience with all things connected to gas central heating.

The Burner

This component is the heart of the boiler, and when the temperature in the water tank drops to a certain level (thermostatically controlled) the boiler automatically fires up and heats the water in the tank and when the water reaches the optimum temperature, the thermostat cuts out the boiler. This process is repeated as and when necessary, and with a supply of warm water returning back to the boiler after being sent around the house, it is then heated and repumped around the system. There are some references online that goes into great detail about the inner workings of a gas central heating system, which you could refer to.

The Heat Exchanger

This complex piece of equipment boosts the energy efficiency of the system and it is basically a lot of coiled copper pipe that runs through the water, transferring the heat to the water in a very efficient manner. Air conditioning uses a heat exchanger in the opposite way to a central heating system by removing the heat from the interior and replacing it with cool air.

The Thermostat

A key component, the thermostat decides when the boiler is to be fired up, and for how long the burn will continue. If your thermostat is not working properly, or is inaccurate, this usually results in using too much gas, which will show itself when the quarterly bill arrives. Thermostats, like any other piece of equipment have a certain lifespan, and while they can be repaired, you are best advised to have the unit replaced if it malfunctions.

The Water Pump

The water pump is used to pump the water around the home, and has a distinct humming sound, which you hear all the time. The water pump is controlled by a solenoid that activated it when the water needs to be moved around the house, which is very often.

In the event your central heating malfunctions, you are best advised to call out your local gas heating specialist, who will quickly get to the bottom of the problem and carry our prompt repairs.

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