Alpha CB24X Loss Of Pressure

[shazbit]

My gas combination boiler has just stopped working. First the hot water stopped and the hot taps ran cold. The pressure gauge was in the middle of the green zone and no neon’s were illuminated. During this time the Heating worked fine. Then days later the heating ceased to come on and upon inspection the neon’s A and B were flashing Alternately, which signifies that the pressure is to low and the system needs to be re-pressurised. Sure enough the pressure gauge had fell to 0.5 Bar, well below the green zone. The only external control is the reset and this does nothing to change the situation.

Is it possible to re-pressurise the system myself? It has not been serviced since we moved in 18 months ago. Shall I call the Alpha help line or British gas? If any one knows what course of action to take or what might be wrong with it then I will be better equipped to avoid the rouge tradesman.

 

[methaneman75]

take off 2 screws and fold down front panel. Drain boiler using prv, (red valve, turn).
go to back of boiler next to flue and take off the 4 screws at top,and remove metal plate, this gives you access to the exp vessel. Take off cap of schraeder valve and use a bike pump to recharge vessel to one bar on your pump gauge(whilst prv is in the open position.
shut prv, repressurise boiler to 1.5 (water pressure)put back fold down panel and your problem should disappear.
keep and eye on pressure as prv could be passing

 

[twgas]

Drain boiler using prv, (red valve, turn).

a drain cock on the system would be a better option, and leave it open during the pumping process, the rest of the advice is sound though.