Vaillant Ecomax - FN25

[ow]

I have a Vaillant Ecomax boiler and it's showing F25 - which I think is the low pressure error message.

However, I don't know how to top it up - I know there is a valve under the boiler, but when I had a look, I didn't know what to do. Can anyone help?

Thanks
OW

 

[ChrisR]

Looked for the manual on their website?

 

[ow]

I have the manual - it just says follow the instructions provided by your installer. I was hoping not to have to call him out if possible.

Thanks

 

[bobw1956]

Look under the boiler, if fitted remove the cover,

look to the right side of boiler, you will see 2 black levers/handles.

both these will have to be in the open position to allow water to refill the system.

open them by turning away from you, listen and watch the pressure gauge increase to 1.5 bar pressure.

Make sure you turn both levers/handles off after, also disconnect the s/steel hose