Bleeding/pressure drop

[radicalman]

Had a gurgling problem in an upstairs radiator. Radiator hot at bottom but a lot coller at the top. Turned boiler off and bled all radiators starting with the problem one.
I only opened the valve about half a turn - lots of hissing followed by a few drops and then closed the valve, as one should!
However, a couple of the other upstairs radiators release some air but no water expelled, even after a minutes or so and opening the valve a few more turns.
Downstairs radiators are not a problem it seems. What surprises me is that no water came out after the air hissed out of rads. System is only 2 years old.
Returned to boiler and fired up but pressure guage remains between 0 - 0.5bar and only goes to nearly 1.0 bar if the hot water tap is turned on.
The boiler is a BAXI COMBI 105E.
Gurgling upstairs rad now hot throughout and no gurgles.
Any pearls of wisdom greatly appreciated. The cheques banked and the guarantee out of time Kev!

 

[ArtfulBodger]

Pressurise using filling loop to about 1.2 bar, continue to bleed all rads, re-filling as necessary, the pressure when all rads are bled should be about 1.2 bar. Turn it on, all should be OK.

 

[kevplumb]

pressure should be 1 to 1.2 cold some rise is normal
make sure you repressurise the system after bleeding the rads

 

[radicalman]

Thanks artful, thanks kev. I've found the loop but not 100% sure about doing it but,here we go!

 

[kevplumb]

open the tap and watch the pressure guage

 

[radicalman]

It worked, cheers guys. Makes me feel really competent, but on a scale of 0-100 I guess I'm a 1!![/img]

 

[Bahco]

It worked, cheers guys. Makes me feel really competent,

Ever thought about a career in plumbing