Boiler leaking

[Markcowie]

Could anyone tell me what's wrong with boiler it's leaking from inside. When I switch it on and warms up it stops any ideas ? Thanks

 

[havasu]

Looks like a condensate line. Is the PVC cracked?

 

[Markcowie]

Thanks for reply the leak is further up the boiler but dripping onto upvc pipe. My first thoughts where the upvc pipe but found was coming further up boiler but can't see in boiler ?

 

[havasu]

I had a drip pan rot out once so unless you either tear it apart or hire someone to tear it apart, right now it would only be a guess as to what is stopping the condensate to work correctly.