What does E1 mean on a boiler?

What does E1 mean on a boiler & how to fix it?

E1 usually means your boiler is Running low on pressure

Your boiler suddenly flashes the E1 Error Code. Don’t panic, it is likely to just be low water pressure, but just in case we have provided you with a host of different options to ensure you get the correct diagnosis and fix for your boiler.

Low water pressure in a boiler is one of the most common problems that boilers have. You can fix it yourself with our assistance, without having to call a Gas Safe registered engineer.

There are many different error codes out there, and with E1 being one of the most common it is used by a few boiler brands such as Ideal Boilers, Baxi boilers, Potterton, and Main. The latter 3 in that list however are all made by the same manufacturer so all share the same fault codes.

E1 boiler error codes and low water pressure

The E1 Error Code is usually a sign that your boiler is low on pressure. You can simply repressurise the boiler to get everything back to normal. Repressurising a boiler is quite common as boilers get older.

The Error Code could also indicate that there is something else wrong with your boiler or gas supply. The Error Code can help you identify the problem. For example, the E119 Error code on a boiler could indicate that there is low pressure.

Below is a table listing all E1 Error codes and possible causes. If low boiler pressure doesn’t cause the problem, you should call a Gas Safe engineer. Faulty gas boilers are not allowed to be fixed by the law. It is too dangerous.

Baxi, Potterton & Main boilers E1 error code

If you have one of these boilers such as the Baxi 600 you can always contact Baxi customer support, especially if your boiler is under warranty. If you see this error code on any other boiler such as Ideal, It is likely that your pressure just needs topping up.

CODEPOSSIBLE FAULTHow to fix
E20, E28, E50,
E160
Faulty components inside the boilerFaulty components can only be checked, fixed or changed by a Gas Safe registered engineer
E110overheating of the primary water or flue system has occurredIt is likely your boiler has shut down. You can try resetting your boiler and then monitoring if it starts back up. If the boiler does not reset, then you will need to leave it switched off and contact an engineer
E119Low water pressure – This means that the water pressure in the boiler has dropped below 0.5barYou. can top up the water pressure yourself by finding the filling loop and opening both taps at the same time.
E133This is a gas supply issue. Either there is no gas to the boiler or there is a blockage. This may even be caused by the gas been switched off by the provider.You need to ensure that there is definitely a supply of gas to your boiler. If so you can try and reset your boiler. If the error continues to show you need to call a Gas Safe engineer.
E133Frozen condesnate pipe. This can easily be fixed by the thawing of the pipe using warm water.With warm water, you will need to find your condensate pipe outside and melt the ice. Once done your boiler should work again.
E168This is an issue with your boiler but it is unsure what it is. Therefore for safety reasons, your boiler has shut itself off and you need to contact a Gas Safe registered heating engineer.Call a Gas Safe registered engineer right away.
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