boiler pressure and servicing?

cerastes wrote: »

Two things, firstly, I've been keeping an eye on the boiler pressure for a while,
The pressure originally dropped down to around .7bar when cold gradually and around 1.2-1.3 when hot. I could see no sign of a leak anywhere. I had thought Id a weep at the pump but couldnt really see it anymore, I was recommended a liquid leak repair, put that into the heating and let it do its thing.

Few weeks back I operated the manual valve to shut off the rads as I just needed hot water, the pressure dropped off to nothing in a few hours.

I thought this suggested there was an airlock or pocket trapped somewhere? and hoped it wasnt a big leak opening up somewhere, still no signs of a leak though.

So I bled off small bit of air at rads but not much and a manual bleed beside the tank, repressurised to 1 bar, after a while pressure was hovering between .7 and .8 cold,
but after a few weeks its now at .9bar cold, I havent pressurised it again, so its steadily increased over a few weeks on its own?
It seems to have stabilised at that, should I top it off to 1bar cold?


Secondly, Im also looking to get an idea how to find an RGi for a service, I checked Rgii.ie, but not sure how I determine who is a good service person? my boiler is not a condensing boiler so I dont think its complicated, I came across one guy who was listed in my locality on rgii.ie before and I wasnt happy with him/his work, few years back, I saw his name recently on the site and his van on the road but cant see him on the list now?? I dont know if that means something.
But Im not sure who I can trust off the list anyway, as Ive heard rumblings here even about some rgi's, how do I know who Im getting knows their stuff or is prepared to do a proper job?, without knowing this, Id reverted to bord gais but I feel its a bit dear. I dont know what I'll be expecting to pay a local registered guy either though.

cerastes wrote: »

The pressure expansion vessel was replaced about under a year ago, I should have said that, Im not sure why it wasnt up to pressure since then until I repressurised it though. It hadnt been in much use over the summer either but I think it was low from earlier in the year.
This makes me think the leak might have been elsewhere as the pressure isnt reducing now (fingers crossed) and Id used the leak fixing liquid but that was more recent.

cerastes wrote: »

I'll time it if I can, but its not dropping now, it actually went up and stayed there, just not to 1 bar. When it went down it took a few hours that I noticed the time it dropped,that was the second last time I operated the rad valve closed, I cant understand why it dropped to zero then though. The last time, I just had difficulty closing the rad summer valve.
When it dropped, I was concerned Id forced all the flow through the coil and that the pressure had opened up a leak internally and that Id be replacing the tank coil or the whole tank.
Im beginning to suspect the leak fluid did its job
Im still confused though, 2 years ago a small leak stain appeared on the kitchen ceiling and then dried up? its near but not under the hot press and I wasnt certain if this was a leak from somewhere else running down the outside of the pipe or at a join above the ceiling, it went away and I didnt really give it too much thought, just to check every now and again that it didnt start again.

If the pressure thing doesnt resolve, I'll get the service done sooner, but I think Im overlapping the year already, Im just not sure of the quality of what I got done recently in the last few years, except for one. The last 2 years seem to be getting stuff done a lot on the heating.