Help with Alpha CB24 Boiler

[nabby68]

hi
i have a problem with my mums boiler shes in her 80's so needs a boiler working as we enter winter.
Although the problem i have is that the central heating works fine but the hot water does not work.
Ive done alittle bit of research and possibly narrowed it down to the flow switch or diverter valve? ive taken the flow switch off and manually operated it and the boiler fires up but still no hot water.
So could it be that i need a new diverter valve?
Any help appreciated

 

[Agile]

Very likely!

But a fiddly job and somewhat non standard parts involved!

Tony

 

[nabby68]

Very likely!

But a fiddly job and somewhat non standard parts involved!

Tony

can you elaborate please

 

[sbgasman]

more than likley it will be diaphram ,but on this model pump has to be removed for access

 

[nabby68]

more than likley it will be diaphram ,but on this model pump has to be removed for access

so i dont have to take the diverter valve out to get at the diaphragm?

 

[45yearsagasman]

so i dont have to take the diverter valve out to get at the diaphragm?

No, but removing the pump makes the whole job easier. Don't get water anywhere near the PCB. Occasionally the pump unions are a bit of a pig to loosen.

 

[sbgasman]

what ever you do don't disturb any unions on this boiler,remove pump head using the 4 allen screws,you only need to look a unions on this boiler for them to leak

 

[45yearsagasman]

Not if you tackle the job with the correct tools and know what yout doing. I've rarely had a problem.

 

[nabby68]

what ever you do don't disturb any unions on this boiler,remove pump head using the 4 allen screws,you only need to look a unions on this boiler for them to leak

So, I just need to take the head of the pump off to get at the diaphragm?

 

[pallen5000]

Take the diverter valve out, they aren't bad to do but may be a little awkward if it's your first.