Why isn’t my boiler working?

The most common boiler problems and how to solve

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Boiler Troubles And How to Address

Boiler problems are a dime a dozen. This isn’t reassuring when they are an integral part of our daily life. Having to go without hot water or heating can be a huge complication even on your best day. The majority of problems that stop a boiler from working have to be diagnosed and solved by a professional commercial heating engineer. Although, sometimes with the right guidance it can be a quick fix that can be solved with a touch of trouble shooting. This list will give you the information to take the first steps in getting your boiler working and if there’s any questions just give us a call on 0207 9989 005!

pipe leak on a heating system

Heating System Leaks

When someone hears they might have a leak at their property they’ll often enter a state of panic, thinking their property is about to suffer a flood of biblical proportions. You’ll be glad to know this isn’t the case as most leaks are just a few drops to a small pool of water, although they are still a serious problem that needs to be addressed with urgency.

Leaks are one of the most common and most devastating problems you can have with your boiler system. Not only can a leak cause damage to your property and the property of others, but it may also damage the electrical components of your boiler, not to mention your wallet. This can cause further malfunctions to occur and even create an electrical hazard. The reason leaks are so common is read more…

an old boiler that seems to have an angry face

Unexpected Boiler Noises

Wanting to know why your boiler is making a strange or loud noise? Well this isn’t a question that is easily answered, there are many different types of noises your boiler can make with a variety of different reasons behind each. An easy way to put it would be if your boiler is making noise similar to a Marilyn Manson song, then your best bet is to run for the hills and call an engineer! 

Jokes aside, every boiler is expected to make a certain level of noise whether it’s the pipes creaking from thermal expansion or humming as the system starts up. Each boiler is different and will make different noises depending on its model, age and installation. No one will be able to definitively say why a boiler makes a certain noise without inspecting read more…

A boiler pressure gauge on high pressure

Low boiler pressure

Your boiler pressure is just like your blood pressure. You don’t want it too low and you don’t want it too high, you need it just right! Just like your body, your boiler requires an optimum pressure in order to transport the fluid to where it needs to go inside the system. The ideal pressure (for boilers not humans) is normally 1.5 bar but this can vary depending on the make and model installed at your property.

If pressure is below 1 bar then it is probably too low for the boiler to function and it will most likely shut itself down. Having low boiler pressure can also affect the efficiency of the boiler system, this is because it has to work harder to get the water to its destination by using more energy to cycle the water and leading to read more…

A splash in a pool of steamy hot water

Hot Water But No Heating

Having hot water but no heating is one of the most commonly occurring boiler problems and one of the most annoying. If your boiler system is giving you hot water but no heating, don’t panic! You can put the jumpers and blankets away as it most likely isn’t a major fault and can be fixed by some basic troubleshooting. The most common cause for this issue doesn’t stem from the boiler but actually the surrounding components such as a faulty thermostat, motorised valves or radiators. The main factors that will leave you shivering read more…

a hand changing the temperature on a radiator

Heating But No Hot Water

Having no hot water whilst the heating remains functional is a slightly more tricky problem to solve than having no heating but functional hot water. If the issue was the latter it is most likely one of 3 things: the diverter valve, the radiators or the thermostat. Whereas, if the problem is having no hot water but the heating is still operating, the options for what could be causing the dilemma are quite limited. The obvious solution would be the diverter valve, but it could also be a few other factors causing the problem read more…

Frozen Pipe - Kettle

Frozen Condensate Pipe

The condensate pipe’s purpose is to transport wastewater left over from the condensing process to the outside of the property, this water is slightly acidic and is the resulting by-product from recycling the heat from flue gases. Condensate pipes should be prevalent on every boiler that was installed after April 2005, as this was when condensing boiler regulations were introduced in hopes of reducing carbon emissions and boosting efficiency. If your condensate pipe is installed so that part of the pipe is on the exterior of the read more…

A boiler pilot light

Pilot Light Going Out

The pilot light is a small burner that keeps the main burner alight in order to keep the water inside the system heated; newer boilers won’t have a pilot light as they rely solely on electronic ignition. Pilot lights can switch off for a number of reasons, sometimes it’s as simple as a draught in the boiler room and in other circumstances it may be a more complex component that is faulty e.g. a thermocouple. The first sign of a pilot light malfunction would be a lack of heating and hot water output, as the boiler wouldn’t be able to heat anything without a sufficient fuel source being burnt. If your system isn’t producing any hot water or read more…

Close up of a thermostat panel

Unresponsive Thermostat

The majority of boilers have their heating schedule and temperature controlled by a thermostat, with many people now installing a smart thermostat to help boost their boiler system’s efficiency and usability in regards to the controls. You will know if the thermostat you’re using is unresponsive to the boiler itself by seeing if the boiler responds to the thermostat when you change the temperature. If the radiators at your property are on a high heat when the thermostat is set to a low temperature then you know the thermostat and boiler aren’t communicating as they should. On the other hand if the radiators are cold when the thermostat read more…

Heating Control

Boiler Not Turning On

A boiler can refuse to start up or keep switching itself off for a variety of reasons such as: low boiler pressure, an air lock inside the pipes, a faulty thermostat, a closed valve restricting water or gas flow, low boiler pressure and a build up of sludge / debris inside the boiler system. In the event that a boiler detects a problem with the system, then it may switch itself off or not turn on at all as a preventative measure to stop further damage to the system and protect anyone in or around the property. As there are many reasons why this can occur you will need to investigate the problem further to rule out some possible causes read more…