Vaillant boiler not working but no fault code or error to show why?
Our Vaillant boiler heating systems are so important that we make sure they work quickly if there is a problem. Living without hot water or heating has a significant impact on our daily lives.
Fault codes on ecoTEC boilers help to identify issues quickly and how to fix them without the need for an engineer. Older boilers may not sometimes show an error code which is unhelpful.
Is your boiler costing you in repairs and energy bills? See how much a new Vaillant boiler costs here.
Therefore, It can be very frustrating if your Vaillant boiler does not work and there is no error code. It is important to not take any action without being guided.
This can cause a worsening of the problem and more expensive solutions if you do something that you shouldn’t do or end up having to replace a boiler.
These are the basic checks on a Vaillant ecoTEC boiler that you can do yourself safely:
Reasons why your Vaillant boiler may not be working
As with most boiler problems, there can be a simple fix. Vaillant boilers are no different, but sometimes if there is no error code or boiler fault code, it can be a bit of a mystery. Take a look at some of these to help you get your ecoTEC boiler back up and running with hot water and central heating without paying for it.
Check the Energy Supply
No matter whether your boiler is powered by electricity or gas, it is important to ensure that the energy supply has full functionality. In the event that your hot water is not working properly, it is important to verify that you still have access to the water supply.
This simple check can save you from having to call a Gas Safe registered engineer, and it’s easy to turn off the hot water supply unintentionally. Check your power supply, it is possible that you have accidentally turned off the plug.
Do a Vailant Boiler Reset
To reset your Vaillant ecoTEC boiler, make sure the reset button is visible and not hidden behind the boiler case. In some cases, you can turn off your boiler and then restart it.
Before you reset your gas boiler, it is important to read the instructions manual. This will ensure that all necessary steps are taken. If an error code appears on your boiler, do not reset it. Instead, consult a trusted Gas engineer.
Check The Thermostat
You can control the temperature of your hot water and heating using a thermostat. To ensure that your thermostat is not accidentally set incorrectly or knocked, you should inspect it. This may prevent the thermostat from igniting in the event that the room temperature exceeds the set temperature.
Is your water pressure a problem?
A functioning boiler requires boiler pressure. To ensure that the appliance works properly, the system pressure must be adequate. This allows the system to heat the water from the mains. If the pressure drops or rises too much, the system will shut down automatically and stop hot water from being distributed around the house.
To check the Vaillant boiler’s pressure gauge, make sure it is set at the recommended level. Modern boilers sometimes display an error code that indicates if there are pressure-related issues. Learn more about combi boiler pressure issues, and how to fix them.
Clock and Timer
Double-check that your Vaillant boiler is operating at the right time if you use a timer to turn on heating or hot water. It is easy to forget the boiler’s timer when the clocks change throughout the year. You can correct the setting or turn it off to reset the boiler’s timer and start heating again.
Latest Power Failure
Your boiler could have reset to factory settings after a power outage. This may cause problems with its functionality. To adjust the settings to your liking, refer to your boiler’s instruction manual.
Valve Fault
If hot water is not flowing from the taps or shower but heating works as it should, then this could indicate a problem with the diverter valve. This is the part of a combi boiler that switches between heating the property’s heaters and hot water. If hot water is not available, it could be that the valve is unable to open. This is usually due to the fact that it is stuck in the central heating position or is damaged or faulty. For further assistance and repairs, consult an engineer.
Frozen condensate pipe
A Frozen condensate pipe is a common reason for hot water loss in winter months. Frosty weather can cause condensate pipes to freeze. This is the pipe that transfers condensation from the boiler into the drain.
To resolve a frozen pipe, pour warm water on it. Avoid boiling water, as it can cause more damage. If this fails to resolve the issue, you should seek professional help.
Pilot Light
The pilot light going out is the leading cause of hot water or heating supply loss in gas boilers. The pilot light is what ignites the gas and heats the boiler’s water. To fix the problem, refer to your boiler’s instructions manual. The method will vary depending on the model and make of the boiler.
If all the above steps have been completed and you still need to follow the instructions, or you are worried about the safety of your boiler heating systems, contact a registered Gas Safe boiler engineer.
Vaillant error codes that can show up on the boiler
As much as you may be having issues and no error code at the moment, there is a good chance that your Vaillant boiler will eventually show an error code, and if it does here are some of the most common error codes that you may come across:
- F22 fault code
- F23 fault code
- F24 fault code
- F25 fault code
- F26 fault code
- F27 fault code
- F28 fault code
- F29 fault code
- F32 fault code
- F61 fault code
- F62 fault code
- F72 fault code
- F73 fault code
- F75 fault code
- F76 fault code
- F84 fault code
My Vaillant boiler is not working properly, do I need a new one?
If none of the above solutions to your Vaillant boiler problem worked then you may need to consider how much the new boiler costs and how much repairs cost in the long term. New energy-efficient a-rated boilers are built much better these days and last much longer. It may be worth biting the bullet and investing in a new boiler.
