boiler pressure high, then low after rad bleeding

[libertineash]

Hi,

I had a half cold radiator in my bedroom so I bled it on Tues night, I topped up the pressure in my ferrolli boiler afterwards to 1.5 bar as it went down to zero. When i put the CH back on the pressure rose to 3bars in about an hour, so I switched the CH off as I had never seen it get so high, the next morning the pressure was down to 1 bar even though I had topped it up to 1.5. The CH seemed to be working fine through the day, rising to 2 bar only. Then on wed night after not having the CH on for an hour I switched it back on and again it rose to 3 bars.

This morning when I got up the pressure was down to 0.8bars after being switched off all night.

I'm hoping i have been blonde and not done something simple but can anyone shed any light as to what is going on with my boiler...I'm hoping i don't need a new one!

Any help is appreciated.

 

[landyandy]

Hi.

Which model Ferrolli boiler do you have?

Andy.

 

[libertineash]

i'm not too sure - i've looked on the boiler itself and in the manual but it doesnt say

its about 10 years old though if that helps....

 

[bengasman]

pressure vessel needs pumping or replacing. more then a year since last ser vice?

 

[libertineash]

only about 6months - someones coming out on Mon so hopefully they'll be able to fix it.

 

[bellairaphon]

filling loop still attached??? remove it if it is. if not expansion might need recharging