What does E1 mean on a boiler & how to fix it?
E1 usually means your boiler is running low on pressure in the central heating system and you need to simply repressurise it with more water.
Your boiler suddenly flashes the E1 Error boiler Code, but don’t panic, it is likely to just be low water pressure.
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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, and as a boiler that is constantly losing pressure will be costing you more than it should in gas and electricity, sharply raising your bills, therefore it may be cheaper in the long run to get a new boiler replacement, so why not get a quote now?
E1 Fault code meaning and how to fix
E1 usually means that a boiler has low water pressure, causing the boiler not to work. The good thing is this is a simple fix you can do yourself.
- Low water pressure is a common boiler issue.
- Self-fix is possible with our instructions, no need for a Gas Safe registered engineer.
- E1 is common among brands like Ideal Boilers, Baxi, Potterton, and Main.
- Potterton, Main, and Baxi are produced by the same manufacturer.
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E1 boiler error codes and low water pressure
The E1 Error Code is usually a sign that your boiler is low on pressure.
If you have low boiler pressure, you can simply repressurise the boiler to get everything back to normal. Repressurising a boiler is quite common as boilers get older.
- The E1 Error Code might indicate a different issue with your boiler or gas supply.
- Error Codes, such as E119 and E118, can pinpoint problems like low pressure.
- A table is available listing all E1 Error Codes, their possible causes, and solutions.
- If low boiler pressure isn’t the issue, contacting a Gas Safe engineer is advised.
- Legally, individuals are not permitted to fix faulty gas boilers due to safety risks.
Looking for a new boiler?
Check out the best combi boilers in the UK for help deciding on replacing a boiler continuously losing pressure.
Baxi, Potterton & Main boilers E1 error code
If you have a boiler such as the Baxi 600 and you get the e28 fault code (Baxi boiler), 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 however the reasons why could be an issue, like the Baxi boiler E1 error.
| CODE | POSSIBLE FAULT | How to fix |
| E20, E28, E50, E160 | Faulty components inside the boiler | Faulty components can only be checked, fixed or changed by a Gas Safe registered engineer |
| E110 | overheating of the primary water or flue system has occurred | It is likely your boiler has shut down. You can try resetting your boiler and 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 |
| E119 | Low water pressure – This means that the water pressure in the boiler has dropped below 0.5bar. | You. can top up the water pressure yourself by finding the filling loop and opening both taps at the same time. |
| E133 | This is a gas supply issue. Either there is no gas in the boiler or a blockage. This may even be caused by the provider switching off the gas. | You need to ensure that there is a supply of gas to your boiler. If so, you can try and reset your boiler. If the error continues to show, call a Gas Safe engineer. |
| E133 | Frozen condesnate pipe. This can easily be fixed by thawing 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. |
| E168 | This 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. |
Does E1 mean I need a new boiler?
E1 does not directly mean you instantly need a new boiler.
It does, however, mean that you should start looking for signs that your old boiler is starting to cost you money.
If the repair bills start to rack up, it may be better to get a replacement boiler in the long run, especially as new boilers can save you money on your gas bill too.
Where can I get a quote for a new boiler?
Nowadays you can get a quote for a new boiler online with the new breed of online boiler installation companies which will include a new boiler, full Gas Safe installation, a warranty to protect you from any breakdowns or fault codes, and great aftercare. Comparing quotes is also the best way to get a better deal on any new boiler.
How much does a new boiler cost?
If you are looking for a new boiler then expect the cost of a new boiler to be around £2,000 on average for a decent make and model that is built to last. If you spend less than this then you are risking buying something that is a bit cheap and likely to break down in the first 5 years or so, therefore if you stick to this price range, you can expect to get something with a warranty of up to 10 years for your peace of mind.
Which is the best boiler to buy?
If you are looking for a new boiler then you will likely want to know which is the best, however, buying the best boiler isn’t always the way to go as the best boiler for your home may differ from that of your neighbour. That being said, going for reputable brands such as Worcester Bosch, Viessmann or Ideal will mean that you can’t go far wrong.
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