Camray 5 boiler - low pressure. how do i fix it?

[teacherandmum]

ok so we have a camray 5 combi boiler but our hot water isn't very hot at the moment and once you use a sink full, the next sinkful is practically cold. I'm not sure if the radiadtors are working at full capacity as we've not had them on.
we had it serviced in Jan/Feb but i've noticed the pressure gauge is under the red arrow. red arrow on 1.5 and the gauge is at 0.5. so i presume i need to raise the pressure. I understand that there should be a valve or similar to do this with but i can't find anything. The instruction booklet is a mystery to me! There is a valve to the left at the bottom but i've turned it anti-clockwise but nothing happens. I can't find anything else to try.
Please help a woman who doesn't want to call out a plumber for what should be a simple job!!!!!
Thanks everyone!
Julie

 

[SimonG]

You need to find the filling loop. Looks like this:-
But it may be the pressure vessel, top it up and see how you go.

 

[teacherandmum]

and when i've located it , i ..............................???
sorry for being dense!

 

[SimonG]

There's normally two valves, one at each end, either they will have a little handle on or a screw driver slot. Turn one valve on by placing the handle or slot in line with the pipe, then do the same at other end whilst watching pressure gauge.Once upto 1 bar close valves.

Then keep an eye on it, if it's back down over the next few days get somebody to have a look. Could be a problem elsewhere that needs attention.

 

[teacherandmum]

i shall do my best - but i may be back!!!!! Thanks for your time and advice

 

[kimbo]

Raising the pressure in the system wont cure your lack of hot water. These boilers use a printed circuit board to tell each control what to do so you wont be able to cure the problem yourself. The common things to go wrong with these are the diverter valve which may be stuck on heating mode or it could be the flow switch not activating the boiler to come on when hot water is required, it could also be the water pump has gone. First of all check to see if the central heating works.If the heating works then it is not the pump, to check the flow switch you will ned some electrical knowledge I,m afraid.