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Vokera are a cheaper boiler brand in comparison to companies like Vaillant and Worcester, which does also tend to mean that they run into a few more problems as a result. For many homeowners they offer a cheaper alternative to other brands, although this does often come with a downside of having to pay for additional repairs, and in more serious cases where a replacement is needed it can require new boiler installation.
We’ve put together a troubleshooting guide for Vokera boilers to help you diagnose the problem and also tell you how each one can be solved. In some cases, you will need a Gas Safe registered engineer to help, and if you’re based in London please do get in touch with us and we’ll be very happy to support.
Owners of Vokera Vision boilers can experience issues with the ignition, with loud gurgling noises heard when the boiler is turned on. The ignition part can be easily changed, although if the issue is linked to a faulty PCB board it may be a more expensive issue to resolve.
Common Vokera Compact 29a problems include the ‘03’ error code. This is typically associated with the fan, as parts used in Vokera boilers tend not to be of the highest quality and can breakdown. Fans are usually quite straightforward to be replaced – and installing the entire fan is usually a better long-term option to reduce the likelihood of it happening again.
If you experience fault code ‘73’ or ‘79’ this is one of the common Vokera Mynute 20e problems owners can experience. It indicates a fault return thermistor, which should be a straightforward part to replace if that is the root of the issue. Other Vokera thermostat problems can be linked to a limit temperature fault, while other Vokera thermostat error codes can be linked to low temperature issues.
Look out for Vokera boiler ‘01’ error code which appears when the boiler fails to ignite. If resetting doesn’t work then get in touch with us to arrange an engineer. Error code ‘03’ appears because of a faulty fan or flue. As above, if resetting does not resolve the issue Homecure will be able to help.
When it is too low, Vokera boiler water pressure will produce error codes ‘40’, ‘41’ and ‘A04’ on Linea and Compact models. This will mean affect performance levels and a Vokera boiler with low pressure could be due to a leak in the system. If you suspect a leak, get in touch with us right away so an engineer can diagnose and repair.
Vokera boilers with a red light flashing indicates a problem that needs to be fixed. On a Compact model it may produce the ‘A01’ code with a red light that showing an ignition issue. Flashing red lights and red lights that remain without flashing will mean different things and will be something our engineers can help fix.
When the green light is constantly on it means the flame is working, but a flashing green light could be due to a faulty hot water sensor or because it is in standby. A reset may be enough but if not you may need to get in touch to arrange an engineer to diagnose the issue.
You may have a problem with the diverter valve if the water is not getting hot or only gets warm when the heating is turned on. This is a common problem with Flowmatic and Unica HE boilers, but it doesn’t always have to mean the entire diverter unit has to be replaced. This is something a Homecure engineer can assess and repair in a short amount of time.
If the condensate trap or pipe is blocked you will see error codes ‘92’, ‘93’ or ‘95’ displayed. In cold weather the usual cause is a frozen condensate pipe. You can thaw the external section of the pipe, where it runs outside, by pouring warm (not boiling) water over it, then reset the boiler. Do not try to remove or clear the pipe or the trap yourself. The internal condensate trap is inside the boiler casing and is strictly a job for a Gas Safe engineer.
When a Vokera boiler is making whistling, banging or gurgling noises it is usually kettling, caused by limescale or sludge on the heat exchanger, or delayed ignition. In either situation you should get in touch with Homecure to arrange for an engineer to visit and resolve the issue for you.
We are experts at Vokera boiler troubleshooting and can diagnose and repair any problem you are experiencing with your system. Homecure Plumbers London have a team of professional Gas Safe engineers who are available to provide boiler repairs at short notice. Get in touch with us today to make an appointment.
Boiler issue | Possible reason | Should I call a Homecure engineer? |
Banging noises or whistling | Usually delayed ignition, or kettling caused by limescale or sludge on the heat exchanger. | Yes |
No heating or hot water | Can be caused by faulty diverter valves and may produce red flashing lights on the system. | Yes |
Low pressure | There may be a leak in the system – especially if it continues to happen – or an issue with a valve. | Yes – if it is a leak. If topping up the system via the filling loop to increase pressure doesn’t hold, or bleeding radiators to relieve high pressure doesn’t work, get in touch. |
Leaks | Leaks can happen anywhere in the system and may not always be visible. They need to be addressed and fixed right away. | Yes |
Boiler shutting down | Could be a faulty fan or circulation pump, or thermostat, causing the issue and a part needs to be replaced. | Yes |
Problems with thermostat | Usually a limit or low temperature fault that requires the thermostat to be replaced. May also be related to timing and temperature settings. | Yes – if resetting the timings/temperature does not resolve the problem. |
Frozen condensate pipe | Usually just needs warm water to be poured over the external pipe so it thaws out. | Yes – if after thawing the pipe is still blocked there may be another reason for the issue. |
Boiler not igniting / burner fails to light | Faulty ignition electrode, flame detection probe, or gas valve. | Yes |
Cold radiators | If there is too much limescale or sludge in the system water will struggle to pass through the radiator to warm them up. | Maybe – bleed the radiators to see if this fixes the problem. If not, get in touch with us to arrange a booking. |
Kettling noises | This can be another issue related to limescale or sludge in the system that needs to be cleared. | Yes – call an engineer. Bleeding radiators only removes trapped air. It won’t clear limescale or sludge baked onto the heat exchanger. |
Some of these issues are similar to common Worcester boiler problems and common Vaillant boiler problems, which may also require similar repair work.
Expert comment
“Vokera boilers are built to a budget, so we find their internal components, especially fans, diverter valves and thermistors, wear out quicker than on premium brands. If your Vokera is over 8 or 10 years old and you’re getting hit with repeat lockout codes like 01 or 03, replacing multiple parts like the fan and PCB quickly becomes false economy compared to putting that money towards a modern, reliable replacement.”
Expert comment by Lee Devlin, Director, Homecure Plumbers
Turn the mode selector to “Off/Reset”, then back to “Heating and Hot Water” or “Hot Water Only”. If the boiler does not restart, get in touch and we will send an engineer to check it.
Between 1 and 1.5 bar when the heating is off. If it is below 1 bar, top it up with the filling loop (see how to repressurise a boiler). If it keeps dropping or rising, there is a fault that needs an engineer.
A red light usually means the boiler has locked out. Try one reset. If it locks out again, note any code on the display and book a Gas Safe engineer.