In most cases a boiler turns on the pump as soon as there is a demand for heat.
It seems yours is only turning on when the flame would ignite. Thats rather unusual.
Faulty pumps are very common!
Tony
I'm not even sure if thats the case \\tony, the pump is very quiet, and its hard to tell when its on and when its off.
Anyways. After greasing the joints around the pump and electrical box, I reconnected everything, and it ran fine for about an hour. Then the RCD tripped again.
So its off to the merchants tomorrow to get a new pump! I think I had dried the old one out enough to work for a while, but there must be water ingress somewhere I missed. Its going to go sooner or later any way.
Now. The pump is a 10 year old Wilo Gold 60. Powering 13 rads.
Ideally I would like to get a like for like, then I wouldnt have to take off the whole pump, just swap out the front to the o seal. If I cannot get like for like, could anyone recommend a suitable replacement?
I think the 60 is 130mm connection stop to stop. and I think its 1.5" connection? Any advice?
(BTW, thank you all very much for your help thus far. I have learnt a tremendous amount in the last 2 days!!)