Ravenheat RSF 20 - no heating, pressure below 1 bar

30 Aug 2004
Reaction score
United Kingdom
There is no central heating and no hot water since this morning - the pressure bar is showing below 1 bar, the pilot light is out and the low pressure warning light is on.

If this could be a pressure problem - how do I increase the pressure. The boiler is around 5 years old. Can anyone help?

Sponsored Links
open the tap on the filling loop and watch the pressure 1 to 1.2 cold
filling loop is silver flex pipe btween cold main and heating pipe
usually(but not always )near boiler :D
Thank you so much! That's done it. I have been working hard all day and was desperate for a bath!

The manual didn't show where the tap was. Something to know for the future!
Sponsored Links
Note that the pressure must not be more than 1.5 or so!!!!
In other words - hope you remembered to turn vaslve on filling loop OFF before pressure went too high.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local