Bosch RD 532 pressure too high?

[Jane23458]

when boiler was checked a couple of months ago, remember the BG engineer saying pressure quite high and he'd fixed it. We've noticed a loud humming at night when heating on, and now realized the pressure is 2.5 bar when heating on, and up to 3 when on, when the green band ( I assume the norm) iis betweeen 1 and 2 Is this dangerous, should I ring BG? or is it somethnig I could fix, any reply appreciated.

 

[stevetheplumber]

make sure the filling loop is turned of and the hose removed

 

[dontknowitall]

Although you might get messy, you could try undoing (without taking it out!) a bleed valve on a radiator and letting some water out. If this makes a difference after a few minutes and brings the pressure down, all well and good. If the pressure increases again the next day (or so) it could be the filling loop has a "fault" in it as it indicates water is constantly entering the heating system.

If I was you, I'd fetch BG out again and see what they suggest.

 

[aggis]

Give BG a call, should be a simple fix. Proberly the expansion vessel wants recharging, unless the filling loop is passing.

 

[Jane23458]

thanks, did that and it reduced pressure to 2, will monitor to see if goes up again, and if so will ring BG like you and other suggest

 

[Jane23458]

thanks for quick reply, did bleed a radiator of some water, and pressure went to 2. If it increases again, will ring BG