Zero pressure on combi boiler

[AngelaR]

Hello,

I have a Worcester Bosch 24CDi RSF combi boiler and the grey pressure needle is on 0. Can anyone advise me on how to raise the pressure. There is a plastic tap underneath the boiler, which I have turned to the left and right, both of which have made no difference.

Another more minor question I have, is whether it can damage the boiler if the hot top is frequently turned on and off, for example when rinsing dishes while washing up!

Thanks

 

[45yearsagasman]

After inserting the white key,just to the right there is a small white knob which you must turn to introduce water to the boiler.After the pressure is back up,turn off the small tap and remove the key.
Frequent on/off operation will wear the diverter valve and the diaphragm more quickly so it is not recommended.

 

[AngelaR]

Thanks for your prompt reply.

Do I turn the key to the left or the right, and how far should I turn the knob?

 

[Gasguru]

Put a little soap on the seals of the key...it will then fit easier. Push it up and rotate untill you feel it move up a little more, then turn to lock it in position. Unscrew the filling valve untill you here the water flowing. Raise the pressure to 1 Bar....DO NOT EXCEED this. Shut off the valve and remove the key. Then put the heating on and check the pressure doesn't rise to more than 2 Bar.

 

[AngelaR]

Thanks 45yearsagasman and gasguru, have done what you recommended and the pressure is now back to normal. Can't get the key out though, does this matter?

 

[bengasman]

I have a Worcester Bosch 24CDi RSF combi boiler and the grey pressure needle is on 0. Can anyone advise me on how to raise the pressure.

See FAQ

Another more minor question I have, is whether it can damage the boiler if the hot top is frequently turned on and off, for example when rinsing dishes while washing up!

Increased wear and tear is all.