Vaillant boiler pressure

Just make it work · 1 Apr 2019

Evening,

Having some trouble with my Vaillant Ecotec Plus 418, which is showing a F22 error code - low water pressure. Sadly there isn't a filling loop that allows me to repressurise it.

Does anyone know how I might get around this? When I reset it, it starts up but then winds down quite quickly. No noticeable problems in airing cupboard.

Thanks!

IMG-20190401-WA0005

Just make it work
1 Apr 2019

IMG-20190401-WA0007

Just make it work
1 Apr 2019

ianmcd · 2 Apr 2019

Do you have a HW Cylinder somewhere? is there a small expansion vessel (usually red) if there is your filling loop will be there

muggles · 2 Apr 2019

This can also be caused by a faulty pump or air in the system

Mottie · 2 Apr 2019

Just make it work said:
Sadly there isn't a filling loop that allows me to repressurise it.

How was it filled up initially then?

Just make it work · 2 Apr 2019

Motman said:
How was it filled up initially then?

Good question!

Just make it work · 2 Apr 2019

Thanks for the replies. Hoping the fault is the water pump so will be examining it more closely tomorrow.

hertsboilers · 2 Apr 2019

Check the smaller head tank for water in the loft if you don't have a pressure gauge and filling loop.

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Vaillant boiler pressure

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