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2024 Vokera Boiler Error & Fault Codes

Vokera have become the number one choice among consumers in the UK when it comes to boiler installations. Their efficient boilers reliably heat your home to a peaceful, comfortable temperature regardless of the weather outside. As a result, you can save both time and money. However, it's crucial that any faults in your boiler are diagnosed as soon as possible in order to avoid any serious issues. The problem is there are so many different error codes that come up on your boiler display that identifying the fault can often be difficult.

Vokera boiler error codes could be a source of worry, but don't panic if you find that the boiler is flashing. There are a number of reasons why it might be doing this, and there are steps that you can take to determine the code so you will know what needs fixing. There are a few things you can do to rectify the problem and have your boiler working again swiftly. Firstly, it's important you understand why an error code might occur in the first place. There are a number of reasons why this can happen, including blockage, low water pressure, overheating and circuit problems.

General Vokera Boiler Error Codes

Let's imagine your Vokera boiler has displayed an error code. Knowing what this error means and how you can rectify the problem will keep your weekend plans on track, rather than having to make a dash for the spare bedroom to stay warm!

Fault Code Possible Cause
_CLCall for service
A01Ignition failure flame not sensed – internal fault
A02Limit thermostat fault
A03Fan fault
A04Insufficient system water pressure
A06Domestic how water (DHW) thermistor fault
A07Primary flow thermistor fault – temperature of water is too high.
A08Return thermistor fault – water temperature too high.
A09Flue thermistor or flue thermistor counter fault.
A11False flame
A77Low temperature thermostat fault
ACOService operation
N/AFlame on
PPreheating function active
PBlinking Preheating function running
1Failure to ignite
3Problem with fan/flue
4Insufficient water pressure
5Reset as described for code 01
6Hot water thermistor open circuit
7Primary thermistor open circuit

Vokera Mynute Boiler Error Codes

The Vokera Mynute Boiler Error Codes below will help you to determine the cause of your boiler heating problems. If your boiler is not heating up or with low hot water output then this list will help you solve it. You will learn how to troubleshoot your boiler in order to get it back to normal operation.

Fault Code Possible Cause
AL10, AL20, AL21, AL26, AL28, AL34Try resetting the boiler, if the fault reoccurs you need to contact a heating engineer.
AL40Check the system’s pressure and refill if necessary. Reset the boiler, if the fault reoccurs then you need to contact a heating engineer.
AL41Check system pressure – refill if necessary. If fault reoccurs, contact a heating engineer.
AL52, AL55, AL60, AL71,AL73, AL74, AL79Contact a heating engineer.
AL74, AL79Reset the boiler. If the fault reoccurs, contact a heating engineer.

Vokera Evolve Combi & Evolve System Error Codes

Here is a list of known Vokera Evolve Combi and Evolve System Error Codes and the problems that cause them. If you experience any problems with your boiler, then check through this list to see if you can find matching error codes which may identify the problem. If you would like more information then get in touch with the professionals.

Fault Code Possible Cause
E10Flame lockout
E011Extraneous flame
E020Limit thermostat
E030Fan fault
E040Water transducer – check system water pressure
E041Water transducer – check system water pressure
E042Water transducer fault
E060Domestic hot water probe fault
4070Fault flow sensor over temperature – flow sensor flow/return line probe differential alarm
E077Main zone water thermostat
E080Error with return line probe – over temperature outlet or differential alarm
E090Flue gases over temperature probe
E091Clean primary heat exchanger
Water pressure low
Water pressure high
Boiler board communication lost
BUS 485 communication lost
E021, E022, E023, E024, E067. E088, E097Iono alarm
E085, E094, E095Combustion fault/high CO
E058Main voltage error
E065Current modulation alarm
E086Obstruction fumes alarm

Vokera Boiler Error Lights Guide

If you have a boiler without an LCD display, it won't have an error code to tell you what's wrong with the unit. Instead, it has light indicators, which make be either on or flashing depending on the issue.

Vokera Boiler Red Light On

If your Vokèra boiler has a red light flashing or on constantly, then your heating and hot water system will likely be out of action until this issue is resolved.

This will help you find out the reason why your Vokèra boiler is showing a red light so that your heating and hot water will work once again. Our guide will also help you diagnose some of the most common faults with faulty boilers to save you money by finding the issue yourself rather than calling for help.

Vokèra Red Light Causes

A constant green light will always indicate that your boiler is operating correctly. However, in the unlikely event of a fault occurring, this can lead to one or more red lights appearing independently or alongside a green light.

Red Light On and Green Light Off

A constant red light on your Vokèra boiler means your boiler will not heat. This safety measure has been activated to prevent overheating and potential damage to your boiler. Potential faults can include:

  • A fan fault is preventing gases from being expelled from the flue.
  • An overheating boiler
  • No hot water is being circulated to either the taps or the radiator indicating a pump problem.

Red and Green Lights On

If your Vokèra boiler has both red and green lights lit, it could be one of two issues. One is an issue with your pressure switch or burning out of the flame sensor. The other is the flow switch. If you ever see both Red and Green lights flashing on your boiler, your burner flame may have been extinguished due to water temperature falling below the appropriate level for safe operation. It could also be that your pressure switch is stuck in the open position.

  • Broken temperature sensors either not working or showing incorrect readings.
  • Error with the water pressure, whether too high or too low.

Flashing Green Light

When a Vokèra boiler functions properly, the green light on the front is constant. If the green light starts to flash, this indicates an issue. If the red light also flashes at the same time, it’s a reason for concern.

  • Boiler has defaulted to standby mode
  • Broken hot water sensor

How to Reset a Vokèra Boiler

If your Vokera boiler fails to heat or produce hot water and the safety reset button is not visibly triggered, try resetting the boiler. This could help it return to normal operations.

To reset your Vokera boiler, move the mode selector switch to the ‘OFF/RESET’ position and then move it back to either ‘hot water only’ or ‘heating and hot water’. Should this reboot get your boiler working again then you’ll know because there will be a constant green light. If not, you should hire a Gas Safe engineer to come out and take a look over your boiler.

If you’re experiencing problems with your Vokera boiler, it may have become unresponsive or locked. To reset it, first switch the mode selector switch to OFF/RESET and then to either 'heating and hot water' or 'hot water only'. If your boiler is still not working, it’s likely that there is a fault with the boiler itself. Call a Gas Safe engineer to come and inspect the boiler.

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