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Having trouble? Click here to access our troubleshooting guide.
Your Question:
ecoFIT sustain
The Vaillant ecoFIT sustain 800 series is a High efficiency boiler that is currently in production. Please check the frequently answered questions below for any help you may need. You can also click here to visit the appliance homepage.
FAQs
What kind of Appliance is it?
This appliance is a high efficiency condensing combi boiler. This means it heats water when you draw a tap. It doesn't need a water storage tank or a cylinder because the boiler is connected directly to the water mains, heating water as its needed.
When was the boiler manufactured?
This boiler is a current boiler, was first manufactured in 2016 and is still in production.
Is there a clock or roomstat available?
A broad range of Vaillant thermostats and clocks are available. You can find technical help on these by typing in your model into the question bar above or by browsing through our homepage
here.
What is the recommended water pressure?
Your boiler should be pressurised to between 1 to 1.5 bar.
How do I top up the water pressure?
You can find help in topping up your pressure by typing in your boiler model and "low pressure" into the question bar above as well as clicking
here. You can also find more information by checking the user manual as well as checking our
Youtube Channel.
My boiler has a fault and I need some help?
Your boiler should work reliably for a number of years if it is serviced annually, however occassionaly faults can occur. In a lot of cases faults can be temporary and if the boiler is reset it will start working again. You can find out how to do this by selecting the user manual below (under available literature). We have created a special troubleshooting guide which you can access by
clicking here which may help you resolve the issue. If you continue to experience problems please
click here for contact information.
I am an Engineer. I would like technical information. Where can I get help?
If you are a suitably qualified Gas Safe registered Engineer you can access our comprehensive technical help section by
clicking here.
Available Literature
Installation Manual User Guide Brochure
Disclaimer: Whilst every attempt is made to ensure the accuracy of information contained on this help centre, errors can occasionally occur. The Vaillant Group cannot accept any responsibility for any reliance upon such information, any omissions or any subsequent loss or damage.Vaillant Group recommends that only qualified, gas safe registered engineers carry out repairs, installation or servicing.Vaillant Group reserves the right to amend , update, or withdraw any information within the help centre without prior notice.
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