Boiler pressure too high?

AFF8879

I bought a flat a couple of months ago which I have been renovating and moved in recently. I noticed the boiler didn't look like it had been serviced for about five years, so first thing first I called out British Gas who did that - and installed Hive system - no problems at all (it's a Worcester boiler which apparently are good).

However the pressure gauge is almost at 3 which I know is too high, plus it very occasionally drips out of the pressure valve which again I guess is a sign.

How can I fix this? I've read conflicting things about whether bleeding radiators sorts this problem, also it's a ground floor flat so I was told the pressure would always be higher than average as the water has to travel down from above.

Appreciate any advice - I'm subscribed to British Gas homecare but don't want them to think I'm an idiot haha, plus I'm sure the engineer would have mentioned something if it was that serious??

TheCyclingProgrammer

Bleeding the radiators is a start...if there's a lot of air trapped in the system then removing it will cause the pressure to drop.

atolaas

If the Hive system is playing up and was only recently installed...British Gas may come out and check it out for free. There's no harm in asking!

southcoastrgi

BG serviced the boiler, it sounds like it's either been repressurised too high or there is another fault, the fact that the prv is opening & dripping means that it almost certainly will need replacing & on a WB that is a major pita, get them back out to fix the problem, it makes no difference what height your flat is for the problem you have

Chanes

It's been mentioned - bleeding the radiators drops pressure I see that when I do mine now and then.

Grenage

Bleed rads to reduce pressure, and see if it increases. Could be a filling loop slightly open or a blockage/issue with the expansion vessel. It's not uncommon for the pressure relief valve to not close properly once activated.

So just bleed and see if pressure increases after than. Come to think of it, are you actually using the heating?

googler

There should be a drain valve at the lowest point in the pipework, such that an operative could drain the system if required. This will allow you to let some water out without bleeding radiators. This valve should also be in the vicinity of the boiler, so you may be able to release some and watch the pressure at the same time. May look like this;



Hopefully it will be in a place where you can catch the water underneath, which won't be as easy from the top of a radiator.

As was said above, make sure the filling loop is definitely closed, and not letting a gradual trickle in all the time.

"it's a ground floor flat so I was told the pressure would always be higher than average as the water has to travel down from above."

Travel down from what? From where?