the make and model is an alpha cd24c the contrail heating is working fine the hot water works then the pressure indicator flicks up then cut out with the A led flashing and B on , I don't seem to have a filter in line as fare as I can see the pump again is working.
the boiler is aprox 8 years old
I had to slow down the water into the boiler to get any hot out of it
ok thank you
ok thanks Andrew