This is possibly one of the most common questions we are asked!
When working out your radiator size, there is one number you need to know - How many BTU's (British Thermal Units) you need.
BTU is the standard measure that describes heat output. To calculate how many BTU's you need to heat a room, you simply multiply the width by the height by the length of the room in Feet. This will give you the cubic feet of the room. Once you've done that, you multiply the result by 4, or if its a kitchen you can multiply by 3.
For example, I have a Bedroom thats 15ft long by 13ft wide by 7ft high. My calculation would be:
15 x 13 x 7 = 1,365 cubic Feet. 1,365 x 4 = 5,460 BTU's.
You can then find a radiator that has a BTU output similar to what you've calculated.

Even the best boilers do go wrong every now and then. This is why manufacturers put helpful fault codes on the screen if something does go wrong. The first thing to do is find out what the fault code means. You can do this by Googling the fault code and boiler manufacturer. This will give you a good idea as to what the problem is. Sadly, there are only a few fault codes that you can do something about. Mostly it's topping up the pressure on your system. If this is not your case, you may need to give us a call as it's ussually a little more complicaited.

There are small number of things that could be causing this. First off, check your boiler, is there power there? If not, it could be a blown fuse. If you are comfortable in changing a fuse, you can try changing it; just make sure you use the correct rating! If there is power, then on modern boilers there's a screen that shows if the boiler has detected a fault. This screen would normally give you a fault code if this is the case. Simply Google the boiler you have and the fault code to find out what the problem is. Somtimes it's just low pressure, this would be an F.22 fault code on a Vaillant boiler. It's a simple fix, simply turn both the valves on for your filling loop and keep an eye on the pressure. Once it reaches 1.5Bar, turn the filling loop off again. You'll know the filling loop is on because it'll make a noise like when you open a tap.

A common boiler issue people face is when a home has hot water but no central heating. This can happen because of several reasons. Firstly, if you have a combi boiler, it might accidentally be set to only heat water but not the central heating. This can happen if the boiler is set to this mode during the summer months when radiators do not need to be heated but is forgotten about.
It may also be that the boiler is set to turn on at an unexpected time. Check the boiler display to see if this is the case.
Another cause could be that the boiler is working fine but there is trapped air in the radiators stopping them from heating up. The solution there is to bleed the radiators to allow the trapped air to leave the system. Lastly, Your thermostat could be malfunctioning and not sending the signal to turn your central heating on. If it's battery power, you may need to change the batteries, or if its a wireless one then it may need resyncing.
If your central heating system is still not turning on, despite having hot water, it may be that the boiler or heating system is faulty. We will be able to investigate the fault and find the source of the issue.

Another common boiler problem is kettling. Boiler kettling occurs when water is heated too quickly and reaches boiling point, causing steam to be generated and air to become trapped. The trapped air gives off a whistling sound, like a kettle.
Boiler kettling can be caused by limescale build-up, which slows down the flow of water in the system and causes it to heat up excessively. A faulty component on the appliance could cause the boiler to heat up water to higher temperatures than expected.
We will be able to inspect the system and identify the cause of the kettling. There is a solution to this problem which depends on the severity. Sometimes the noisy component can simply be cleaned using different methods, alternatively replacing the parts may be required.

A frozen condensate pipe is an issue that many people face during the colder months. Every condensing boiler has a pipe that transports waste water produced during the condensing process outside the property. If temperatures drop below freezing, the water in the condensate pipe can become frozen, forcing the system to shut down automatically as a precautionary measure.
The best way to fix a frozen condensate pipe is to pour warm water onto it to thaw it. This should allow waste water to exit the pipe, meaning the boiler can turn back on.