Plumbing/water Pressure Issue

[heatherd1409]

Hi all.

Not been able to use my combi boiler all day and checked the manual online and it's giving me an error code of F1 which means the water pressure is too low. Gone to my water pressure gauge and there is no valve to increase the pressure. What do i do? how do i increase the pressure of it without calling a plumber? Any help appreciated.

[SirOracle]

There must be a valve heather. Somewhere on the mains inlet at the boiler.
Your handbook should show you where it is situated.
Find the inlet valve and turn it on watching the pressure gauge on the boiler. When the pressure gets to the required figure then close the valve immediately.

[The Builder]

Most combis have a "filling loop", as Sir O mentioned. For some reason, several boilers have connections only, and you have to physically make a pipework connection yourself.

What is the make and model?

[grumpyman]

I have a Worcester Bosch combi, and it doe's not have an external filling loop. To increase the pressure you have to remove the bottom tray and insert the attached key and then open a small valve.

[Dodger666]

My sister's Vaillant combi boiler has a screw in an almost impossible position to see underneath the boiler. You need to use a screwdriver to open and close the top up valve.