boiler will not fire up

[rayward]

hi, new to site and in need of advice
i have just changed diaphragm and boiler was working fine,
but now it won,t fire up, on hot water all you can hear is a clicking the same clicking as if the DWH flow switch was off.
on central heating still no joy.

any advice?

 

[45yearsagasman]

Is your boiler a white one by any chance?

 

[dcawkwell]

A leak perhaps?
Loose wire caught when changing the diaphragm.

Otherwise engineer time.