Alpha Boiler Error Codes, Causes & How To Fix

James Elston
Written by James Elston
Updated on 4th December 2023
Posted on 3rd December 2023
Alpha Boiler Error Codes, Causes & How To Fix

Alpha boilers error codes and faults – What they mean & how to fix

alpha boiler error codes and faults

Alpha boilers are one of the most popular boiler manufacturers in the UK. However, even the most reliable boilers will break down from time to time.

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But, when you’re able to compare the error code shown on the display screen with the details in this article, you’ll soon have a good idea of what’s going on. You might not need a new boiler just yet.

Now there are some errors that you’ll be able to sort out yourself, but some will need an engineer’s attention.

If you have boiler cover, then that just means a quick call to customer services, and the engineer will be on their way.

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If you don’t have cover, we suggest asking friends and family for recommendations for a reliable and trustworthy Gas Safe registered engineer to help you. They can help you with most types of boiler faults.

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Common Alpha Boiler Error Codes & Faults

Whether it’s your Alpha Eco boiler e10 fault or your E-Tec not heating up, there are some error codes that are more common than others. With that in mind, we’re going to look at the ones you’re most likely to see first.

At the end of this article, you’ll find a table with all the Alpha boiler error codes listed for you. The best combi boilers and system boilers have their off days so it is just one of those things!

How to fix an E01 error code

alpha boiler error codes and faults

The Alpha boiler e01 error appears when there has been a problem with the ignition system. Generally, this means that there was no flame detected when your boiler tried to light the burner to then heat the water.

You should check the gas supply first when you get the Alpha boiler error code e10. However, if that’s okay, then the issue is likely to be caused by one of the following problems:

  • damaged pressure tubes
  • a gap in the ignition electrode
  • a gap in the flame sensor electrode
  • damaged ignition generator or lead
  • incorrect gas valve setting

All of these will need an engineer to come out and fix the problem for you.

How to fix an E10 fault code

The Alpha boiler e10 error code is telling you that your system has a low boiler pressure reading.  So that’s likely to mean that it has dropped to under 0.6bar, and as a result, your boiler is unable to operate.

Adding water to the system to increase the pressure will bring it up to the required level. If you’re not sure how to do this, then your manual will provide instructions,

However, do be aware that when there is a loss of pressure, it often means that there is a leak somewhere. Have a look at our troubleshooting guide for more help with pressure problems.

How to fix an E20 fault code

The Alpha boiler e20 error means that your heating system is not able to detect a flame. So, the boiler then goes into shut down to prevent there being any safety issues. This is one that will need an engineer to come out and establish what’s causing the problem.

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alpha boiler error codes and faults

How to fix an E96 error code

When the Alpha E96 error code appears, then there can be two different issues. Firstly, it might be that the fan is faulty and then secondly it could be due to a blockage in the flue.

Both of these will need the casing to be taken of the boiler, and so that then means that you’ll need a gas certified engineer to come out.

All Alpha Boiler Error Codes

Here’s our complete list of error codes for Alpha boilers.

Error CodeFault
1Failure of the ignition system
2Lockout due to boiler overheat
3Thermostat temperature too high
4A fault within the gas valve electrical connection
5Heating flow sensor fault
6A faulty sensor in the domestic hot water system
8Resets gone over the maximum threshold
10Low primary system pressure
12Fault in the cylinder sensor
15An error within the internal wiring
16Faulty fan
20A fault within the sensing of a flame
24Fault with the control panel button
25Lockout due to overheat
27Primary flow insufficient
29Fault with the flue sensor
31Communication lost with the external control
37Voltage supply too low
38Rectification due to loss of flame
43Rectification due to loss of flame
44Lockout due to safety issue
46Intervention by an external sensor
47The output of the burner is reduced
96Faulty Fan or the flue may be blocked

Alpha error codes and faults summary

alpha boiler error codes and faults

When there’s no hot water from your combi boiler or heating, it’s essential to get your boiler working as soon as possible.

With the help of the error codes, you should gain an idea of what’s going on and whether you can fix it or if you’ll need to call out an engineer.

Prevent further error codes by getting an Alpha boiler service every year.

There does, though, come a time when the cost of repairing your boiler begins to add up. This might be when you decide to start afresh with a new boiler. With the field of home heating having gone through so many changes in recent years, you may also find that a new boiler is much more economical to run! The new boiler cost may be less in the long term, rather than the mending and fixing of an old boiler.

To see our personalised suggestions for your next boiler replacement, take a look at our fixed price replacement boiler service.

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Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 3rd December 2023

James Elston is our resident boiler replacement and heating expert here at Boiler Central. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. This can be from simply procuring the latest best combi boilers, to reviewing and ensuring that Boiler Central maintains the highest standards across our boiler installation company.

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