Boiler/Waterflow/GCH question

[Gooka]

Hi Guys

Newbie question - sorry if it's a really obvious one but I've not had much to do with boilers or GCH before in my life.

We had a radiator fall off our wall recently. A plumber re-fixed it on and sealed the pipes and everything appears to be OK in that regard.

However, since then, the water flow in the shower has been worse than usual. I also noticed a small red box in the boiler room is hotter than normal now also.

Not sure if these things are all related, but I recall a friend once mentioning they nearly blew up their boiler because it had air in the system, so just wanted to check if there's anyway these things could be interlinked, or if there's someway I can 'release' to see if any air is in the system?

Again, sorry if the post is a bit scatty - if you need more info, let me know.

 

[bengasman]

If it all happened at the same time it is fair to assume there is a relation.
What is a small red box?

 

[Gooka]

If it all happened at the same time it is fair to assume there is a relation.
What is a small red box?

The box says 'Grundfos Selectric' on it. And says Class H. Not sure what it is though?

 

[bengasman]

Grundfoss is a pump brand and they are usually red.
Could well be you have air in the system.
See faq

 

[namsag]

People never touch pumps untill something else goes wrong then they think something is wrong because its warm to red hot this is normal...

As for shower it may be coincidence it maybe he has turned avalve partially closed by mistake

 

[D_Hailsham]

Never see this described as a small red box before

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