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New Boiler to replace a old Worcester 35CDi II

Good morning guys,

I've noticed my pressure bar has gradually Been going from 1.5 to now sitting at 1 bar since it last lost pressure and I got the error.

Is this a cause for concern because I can see it coming up with the same error again in 2-3 days which makes me think I have an issue somewhere and I still think back to those radiator valves.
 
Over night can you close both 22mm valves eg first 22mm pipe either side flow and return over night

Make sure heating is off for this test
 
ShaunCorbs said:
Over night can you close both 22mm valves eg first 22mm pipe either side flow and return over night

Make sure heating is off for this test
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Although I'm learning and understanding things more I'm still not sure what valves you mean 😆
 

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The left and right ones eg white drain valve and the other one connected to the right if the filling loop
 
The black valves on the big pipes
 

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ShaunCorbs said:
The black valves on the big pipes
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Ok will that do tonight and see. What will it show me by the way or what am I looking out for come morning with both them closed?

We had heating on as normal yesterday and used hot water etc. Before we went to bed I took a picture of the boiler and where pressure was then again this morning when I got up. See attached.
 

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If it’s where it was after you closed the valves the leak is on the system but if it drops it’s the boiler
 
ShaunCorbs said:
If it’s where it was after you closed the valves the leak is on the system but if it drops it’s the boiler
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Ok pal nice one. Will check tonight and see. One thing I've just noticed when going to wash the cars is the outside tap is leaking by looks of it. I assume this wouldn't be the issue?
 

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So I shut off the valves last night and took a photo along with one this morning when I opened them back up.
 

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So does that not point towards a boiler issue? Or should i of done it a different way? In stages what i did....

1) Turned Valves off at 11PM
2) Took photo of pressure gauge
3) Took photo of pressure gauge at 7AM
4) Opened Valves back up and needle stayed in the same position.
 
True but once the valves were open the pressure should rise I’m guessing the heating was still warm when you turned the valves off last night hence the 0.2 drop ?
 
ShaunCorbs said:
True but once the valves were open the pressure should rise I’m guessing the heating was still warm when you turned the valves off last night hence the 0.2 drop ?
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Yes, the heating went off around 10.15ish.

Let's say I do it again to be 100% sure.

If heating goes off at say 9pm? Take a pic and close valves at gone 11pm? Then in the morning open valves and then take a pic or take pic then open valve?
 

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